JP2013057265A - Power generation equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase power generation efficiency of the whole power generation equipment by using a rotational drive force, which is a fraction of the rotational drive force obtained by an expanding machine but not used for power generation in a generator, for operating auxiliary machines.SOLUTION: Power generation equipment 1 includes an evaporator 3 for evaporating a working medium T, an expanding machine 2 for expanding the vapor of the working medium T evaporated by the evaporator 3 to generate rotational drive force, a condenser 4 for condensing the vapor of the working medium T expanded by the expanding machine 2 into a liquid, and a working medium pump 5 for circulating the liquid working medium T condensed by the condenser 4, on a circulation pipe line 6 in a closed loop state; and the equipment is configured to drive the generator 8 by using the rotational drive force by the expanding machine 2. The power generation equipment includes one power transmission system 12 for transmitting the rotational drive force generated by the expanding machine 2, in which the generator 8 and auxiliary machines to be rotationally driven of the power generation equipment 1 are installed in series on the one power transmission system 12.

Description

  The present invention relates to power generation equipment configured to be able to use a part of the rotational driving force generated by an expander as power for an auxiliary machine.

  In power generation equipment using Rankine cycle, such as binary power generation, working medium such as water and low-boiling medium such as organic medium (medium having a lower boiling point than water) is expanded and rotated in an expander used in the power generation cycle. The driving force is generated. Such an expander includes a housing that is airtightly isolated so as not to leak a working medium, and a drive unit such as a turbine or a rotor is accommodated therein. The rotational driving force obtained by this expander is sent to the generator in the housing via a shaft or the like extending from the drive unit and used for power generation by the generator.

  By the way, the power generation equipment is provided with various auxiliary machines that are devices other than the power generator and that are operated with electric power supplied from the outside. Such auxiliary machines include, for example, a “working medium pump” that circulates the working medium, a “warm water pump” that circulates hot water, a “lubricating oil pump” that circulates lubricating oil flowing inside the expander and the generator, Examples include a “cooling water pump” that circulates cooling water supplied to the condenser. The auxiliary machine also includes electronic devices and devices that operate with external power, such as a control unit.

  For example, in Patent Document 1, “a steam generator that evaporates a working medium by exchanging heat with a heating medium, an expander that expands the evaporated working medium to obtain mechanical power, and is driven by the expander, A generator that generates AC voltage, a rectifier that converts the generated AC voltage into DC voltage, an inverter that converts DC voltage into AC voltage, and power so that the DC voltage or generated AC voltage becomes a predetermined voltage. A power generation device including a control means for controlling an output alternating current to the system is disclosed. In the power generation apparatus disclosed in Patent Document 1, generated power is supplied to an external power system such as an electric power company and also supplied to an auxiliary machine (external load) such as a working medium pump.

JP 2005-31289 A

As described above, in the power generation facility of Patent Document 1, an auxiliary machine (external load) such as a working medium pump is operated using a part of the generated power.
However, in the case of an auxiliary machine that is rotationally driven, such as a working medium pump, it is a motor that rotates the working medium pump in order to temporarily change the rotational driving force generated by the generator to electricity and rotate the working medium pump using electricity. The method of generating the rotational driving force again is extremely uneconomical. This is because the method of sending the rotational driving force instead of electricity in the middle and moving the motor with the supplied electric power decreases the power transmission efficiency according to the power generation efficiency of the generator and the efficiency of the motor, and the direct rotational driving force It is extremely inefficient compared to the way of transmitting.

  The present invention has been made in view of the above-described problems. The rotational driving force obtained by the expander is used not only for power generation by the generator but also for operating the auxiliary machine, thereby improving the efficiency of the entire equipment. It aims at providing the power generation equipment which was supposed to raise.

In order to achieve the object, the power generation equipment of the present invention takes the following technical means.
That is, the power generation facility of the present invention was expanded by the evaporator that evaporates the working medium, the expander that generates the rotational driving force by expanding the vapor of the working medium evaporated by the evaporator, and the expander. A condenser that condenses the vapor of the working medium into a liquid and a working medium pump that circulates the working medium of the liquid condensed by the condenser are provided on a closed loop circulation pipe, and a rotational driving force by the expander is provided. A power generation facility for driving a generator by using a power transmission system that transmits a rotational driving force generated by the expander; and the generator on the one power transmission system It is arranged to be connected to a rotationally driven auxiliary device attached to the power generation facility.

Preferably, the auxiliary device is provided between the expander and the generator, and the rotational driving force generated by the expander is transmitted to the auxiliary device, and the rotational driving force transmitted to the auxiliary device. It is good to be the structure which is further transmitted to the said generator.
Preferably, the generator is provided between the expander and the auxiliary machine, and the rotational driving force generated by the expander is transmitted to the generator, and the rotational driving force transmitted to the generator is transmitted. May be further transmitted to the auxiliary machine.

Preferably, a magnetic coupling is used for power transmission between at least one of the expander, the auxiliary machine, and the generator.
Preferably, the auxiliary machine includes the medium circulation pump, a lubricating oil pump that circulates the lubricating oil of the expander, a hot water pump that supplies hot water to the evaporator to heat the working medium, and cooling water to the condenser. It is good that it is any one or more of the cooling water pumps that supply the water to condense the working medium.

  According to the power generation facility of the present invention, it is possible to increase the efficiency of the entire facility by using the rotational driving force obtained by the expander not only for power generation by the generator but also for operating the auxiliary machinery. .

It is a figure showing power generation equipment of a 1st embodiment. It is a figure which shows typically the principal part of 1st Embodiment. It is a figure which shows the electric power generation installation of 2nd Embodiment. It is a figure which shows the electric power generation installation of 3rd Embodiment. It is a figure which shows the electric power generation installation of 4th Embodiment. It is a figure which shows the electric power generation installation of 5th Embodiment. It is a figure which shows the electric power generation installation of 6th Embodiment. It is a figure which shows the electric power generation installation of 7th Embodiment. It is a figure which shows the electric power generation installation of 8th Embodiment.

“First Embodiment”
Hereinafter, 1st Embodiment of the power generation equipment 1 which concerns on this invention is described based on drawing.
As shown in FIG. 1, the power generation facility 1 according to the first embodiment generates power by driving a generator 8 using the rotational driving force generated by the expander 2. The power generation facility 1 including such an expander 2 includes, for example, an apparatus that generates power using an external combustion engine such as a steam engine, a steam turbine, or a Stirling cycle, or an internal combustion engine such as a gas turbine. However, in the present invention, a binary power generation facility that generates power using a binary cycle is exemplified as the following embodiment.

  As shown in FIG. 1, a binary power generation facility 1 includes an evaporator 3 that evaporates a liquid working medium T, and an expander that generates a rotational driving force by expanding the vapor of the working medium T evaporated by the evaporator 3. 2, a condenser 4 that condenses the vapor of the working medium T expanded by the expander 2 into a liquid, and a working medium pump 5 that circulates the liquid working medium T condensed by the condenser 4. It is provided on a closed loop circulation pipe 6.

The expander 2 described above has a drive unit that is rotationally driven by expanding the vapor of the working medium T. Since the expander 2 according to the first embodiment is a screw expander, it has a screw rotor 7 as a drive unit. The rotational driving force generated by the screw rotor 7 is transmitted to the generator 8, and the generator 8 generates power.
The evaporator 3 and the condenser 4 are both heat exchangers, and the evaporator 3 can evaporate the working medium T on the secondary side by supplying warm water to the primary side. Further, the condenser 4 can condense the primary working medium T by supplying cooling water to the secondary side thereof. Further, a hot water pump 9 for supplying hot water to the primary side of the evaporator 3, a cooling water pump 10 for supplying cooling water to the secondary side of the condenser 4, and the like are provided as auxiliary devices. The auxiliary machine includes a working medium pump 5 that circulates the working medium T, a lubricating oil pump 11 that circulates lubricating oil supplied to the bearings of the expander 2 and the generator 8, and the like.

  When generating power with the binary power generation facility 1 described above, hot water is sent to the primary side of the evaporator 3 using the hot water pump 9. Since the liquid working medium T supplied to the secondary side of the evaporator 3 is an organic medium having a lower boiling point (than water), it easily evaporates and the liquid working medium T changes to vapor. The vapor of the working medium T obtained in this way is sent to the expander 2 and expands in the expander 2 to rotate the screw rotor 7 (drive unit). The vapor of the working medium T used to rotate the screw rotor 7 in this way is sent to the condenser 4. Cooling water is supplied to the secondary side of the condenser 4 using a cooling water pump 10, and the vapor of the primary working medium T is condensed by the heat exchange in the condenser 4 and returned to the liquid. The working medium T that has become liquid in the condenser 4 in this manner is sent again to the evaporator 3 using the working medium pump 5 and used for evaporation. In such a cycle in which the working medium T circulates (binary cycle), the vapor of the working medium T expands in the expander 2, and the screw rotor 7 rotates by the force of the expanding working medium T to generate a rotational driving force. .

  By the way, the binary power generation facility 1 is provided with one (non-branching) power transmission system 12 that transmits the rotational driving force generated by the screw rotor 7 described above, and the rotational drive transmitted by the power transmission system 12. The generator 8 is driven using the force to generate power. On the other hand, on this single power transmission system 12, not only the generator 8 but also auxiliary equipment attached to the power generation equipment 1 are arranged so as to be connected to the generator 8, and not only the generator 8 but also the auxiliary driving force is supplemented. It can be transmitted to the machine.

  The power generation facility 1 of the present invention can be used in various embodiments (first embodiment shown below) depending on what kind of auxiliary machine is used or where the auxiliary machine is provided in one power transmission system 12. Form to 8th embodiment) can be considered. Specifically, as the power generation equipment 1 of the present invention, the generator 8 is provided between the expander 2 and the auxiliary machine, that is, the rotational driving force generated in the expander 2 is first used as the generator 8. It can be considered that the remaining rotational driving force is used for driving the auxiliary machine. Moreover, as the power generation equipment 1 of the present invention, an auxiliary machine is provided between the expander 2 and the generator 8, that is, the rotational driving force generated in the expander 2 is first used for driving the auxiliary machine. In addition, it is possible to use the remaining rotational driving force for driving the generator 8.

Next, the power generation equipment 1 of the first to eighth embodiments will be described in detail.
As shown in FIG.1 and FIG.2, the power generation equipment 1 of 1st Embodiment is equipped with the generator 8 in the power transmission system 12 between the expander 2 and an auxiliary machine, Comprising: The working medium pump 5 and the lubricating oil pump 11 are used.
In other words, in the power generation facility 1 according to the first embodiment, the expander 2, the generator 8, the working medium pump 5, and the lubricating oil pump 11 are arranged in order on one power transmission system 12 extending from the expander 2. Yes. Then, the rotational driving force generated in the screw rotor 7 of the expander 2 is first transmitted to the generator 8 provided in the housing 13 of the expander 2, and the rotational driving force in the generator 8 is further transmitted to the expander 2. It is taken out of the housing 13 and used to drive the working medium pump 5 which is one of the auxiliary machines, and the remaining rotational driving force is used for the lubricating oil pump 11 which is the same auxiliary machine.

In the first embodiment, the screw rotor 7 (drive unit) and the generator 8 of the expander 2 are housed in one housing 13, and the working medium pump 5 and the lubricating oil pump 11 are respectively placed in the housings 14 and 15. The power transmission system 12 between the housings is provided with first and second magnetic couplings (power take-off devices).
Next, the expander 2, the generator 8, the auxiliary machine, and the magnetic coupling which comprise the power generation equipment 1 of 1st Embodiment are demonstrated.

The expander 2 is a screw rotor 7 that is rotationally driven by expanding the vapor of the working medium T generated by the evaporator 3, and a generator 8 that generates electric power by being rotationally driven in accordance with the screw rotor 7. In one housing 13.
A drive shaft 16 that faces in the horizontal direction is disposed inside the housing 13, and a screw rotor 7 is disposed at one end of the drive shaft 16 (left end in FIG. 1). A generator 8 is arranged on the side. The other end of the drive shaft 16 (the right end in FIG. 1) receives the rotational drive force that was not used for power generation by the generator 8, in other words, the rotational drive force remaining by rotating the screw rotor 7 in rotation. A first magnetic coupling 17 (a first outer cylindrical body 18 constituting the first magnetic coupling 17) is provided outside the housing 13. Note that the drive shaft 16 may be configured as an integral shaft or a divided shaft connected.

The screw rotor 7, the generator 8 and the first outer cylinder 18 are all rotatable integrally with each other via the drive shaft 16. Therefore, when a rotational driving force is generated in the screw rotor 7 by the action of the steam of the expanding working medium T, the rotational driving force transmitted through the driving shaft 16 rotates the generator 8 and the remaining rotational driving force is generated. This is transmitted to the first outer cylinder 18 via the generator 8.
The first magnetic coupling 17 will be described in detail later.

The working medium pump 5 pumps the working medium T used for the above-described binary power generation toward the evaporator 3.
The working medium pump 5 includes a first insertion body 19 that forms a first magnetic coupling 17 in combination with a first outer cylinder 18 provided on a drive shaft 16 connected to the expander 2. This first insertion body 19 is one end side (the left end side in FIG. 1) of the rotating shaft (hereinafter referred to as the working medium pump rotating shaft 20) of the working medium pump 5 disposed coaxially with the drive shaft 16 of the expander 2. ).

  Further, a rotor (hereinafter referred to as a working medium pump rotor 21) of the working medium pump 5 capable of pumping the liquid working medium T is provided on the middle side in the longitudinal direction of the working medium pump rotating shaft 20. Further, on the other end side of the working medium pump rotating shaft 20, a second magnetic coupling 22 (second magnetic coupling 22 is provided) that extracts the rotational driving force transmitted to the working medium pump rotor 21 to the lubricating oil pump 11 side. A second outer cylindrical body 23) is provided.

  The first insertion body 19, the working medium pump rotor 21, and the second outer cylinder body 23 are accommodated inside the working medium pump housing 14 and constitute one unit (working medium pump unit). Yes. Then, the liquid working medium T that has passed through the condenser 4 flows into the working medium pump unit, and the working medium T compressed by using the working medium pump rotor 21 is sent to the evaporator 3, and the working medium T Can be forcibly circulated.

The lubricating oil pump 11 supplies lubricating oil into the housing 13 of the expander 2 (for example, a bearing portion of the expander).
The lubricant pump 11 includes a second insert 24 and a lubricant pump rotor 25 housed in a lubricant pump housing 15, and a lubricant pump rotating shaft 26 to which these are attached.

  The second insertion body 24 is combined with the above-described second outer cylinder 23 provided on the working medium pump rotating shaft 20 connected to the working medium pump 5 to constitute a second magnetic coupling 22. The second insertion body 24 is connected to one end side of the rotating shaft (hereinafter referred to as the lubricating oil pump rotating shaft 26) of the lubricating oil pump disposed coaxially with the working medium pump rotating shaft 20 of the working medium pump 5. (Left end side) A lubricating oil pump rotor (hereinafter referred to as a lubricating oil pump rotor 25) capable of pumping lubricating oil is provided on the other end side of the lubricating oil pump rotating shaft 26, and is pumped by the lubricating oil pump rotor 25. The lubricating oil is supplied to the inside of the expander 2 (for example, the bearing portion of the expander).

Incidentally, as shown in FIG. 1, since the two magnetic couplings 17 and 22 provided in the power generation facility 1 of the first embodiment both have substantially the same structure, hereinafter, the first magnetic coupling 17 is referred to as the first magnetic coupling 17. The configuration will be described with an example.
The first magnetic coupling 17 includes a first outer cylinder 18 provided on the drive shaft 16 and a first insertion body 19 provided on the working medium pump rotating shaft 20. The other end (end on the side opposite to the screw rotor 7) of the drive shaft 16 extends to the vicinity of the housing 13 (partition wall) of the expander 2, and a first outer cylinder 18 is provided on the other end side. . In addition, one end (end portion on the screw rotor 7 side) of the working medium pump rotating shaft 20 extends to the vicinity of the working medium pump housing 14 (partition wall) of the working medium pump 5, and the driven side on the one end side is driven. A first insertion body 19 to which a magnet 28 is attached is provided.

  The first outer cylinder 18 is a bottomed cylindrical (cup-shaped) member that opens toward the other end side (on the side opposite to the screw rotor 7), and is formed of a nonmagnetic material. The first outer cylinder 18 is connected to the other end of the drive shaft 16 coaxially with the rotational axis thereof, and a plurality of drive-side magnets 27 are provided along the circumferential direction on the inner peripheral surface thereof. Yes. The housing portion corresponding to the first outer cylindrical body 18 is recessed inward, and the bottomed cylindrical first outer cylindrical body 18 is rotatably fitted so as to cover the concave portion.

The first insertion body 19 is a columnar body provided at one end of the working medium pump rotating shaft 20, and is formed of a nonmagnetic material like the first outer cylinder 18. The first insertion body 19 is provided so as to be rotatable inside the first outer cylinder 18, and a driven magnet 28 (not shown) is attached to the outer peripheral surface of the first insertion body 19. Yes.
The housing portion corresponding to the first insertion body 19 is convex outward, and the cylindrical first insertion body 19 enters the inside of the projection. This convex part (the convex part formed in the housing 14 for working medium pumps) fits into the concave part (the concave part formed in the housing 13 of the expander 2), and the expander 2 and the working medium pump 5 are fitted. Means that they are adjacently deployed with their interiors isolated.

In other words, between the first outer cylindrical body 18 and the first insertion body 19 and between the driving side magnet 27 and the driven side magnet 28, a partition wall constituting the housing 13 of the expander 2, The partition walls constituting the medium pump housing 14 are arranged in the radial direction along the inside and outside.
As described above, the generator 8 and the auxiliary machines are arranged in this order on one power transmission system 12 that transmits the rotational driving force generated by the expander 2, and they pass through the housing (partition wall) and are magnetically attractive. Can be induced by the first magnetic coupling 17 capable of inducing the pressure and the second magnetic coupling 22 configured in the same manner as this, the expander 2 and the working medium pump 5 can be efficiently powered while being hermetically isolated. Only the rotational driving force) can be transmitted.

  For example, a steam working medium T is circulated in the housing 13 of the expander 2, and a liquid working medium T is circulated in the working medium pump 5. Further, as shown in FIG. 2, the pressure of the working medium T generated in the housing 13 of the expander 2 and the pressure of the working medium T generated in the medium pump housing 14 are not necessarily the same value. That is, since the insides of the housings 13 and 14 have different thermodynamic states such as pressure and temperature, it is not allowed to communicate the two even if the same working medium T is used. Therefore, when the working medium pump 5 is provided adjacent to the expander 2 and the both are directly connected by a shaft to transmit power, it is indispensable to provide some shaft seal between the two.

However, if both are connected via the magnetic coupling as described above, both powers are transmitted via the partition wall of the housing, and the working medium T leaks from the expander 2 and the working medium pump 5 ( It will not leak). Therefore, it is possible to efficiently transmit only the rotational driving force generated in the expander 2 to the generator 8 and the auxiliary machine while preventing the efficiency deterioration due to leakage (leakage) and omitting the trouble of providing the shaft seal. Therefore, according to the power generation facility 1 of the first embodiment, the efficiency of the entire facility can be increased.
“Second Embodiment”
Next, the power generation facility 1 according to the second embodiment of the present invention will be described.

As shown in FIG. 3, the power generation facility 1 of the second embodiment is obtained by changing the arrangement of the generator 8 in the power generation facility 1 of the first embodiment, and one power transmission system extending from the expander 2. 12, the expander 2, the working medium pump 5, the lubricating oil pump 11, and the generator 8 are arranged in order.
Specifically, the power generation facility 1 of the second embodiment transmits the rotational driving force generated by the screw rotor 7 of the expander 2 first to the working medium pump 5 that is an auxiliary machine, and then to the lubricating oil pump 11. The power transmission system 12 (one power transmission system 12) is configured so that the remaining rotational driving force that has not been used in the process is finally transmitted to the generator 8 to be used for power generation. An auxiliary machine is provided in the power transmission system 12 with the generator 8.

Specifically, the power generation apparatus 1 according to the second embodiment uses the working medium pump 5 and the lubricating oil pump 11 as auxiliary machines as in the first embodiment. However, the lubricating oil pump 11 and the generator are used. 8
Is provided with a third magnetic coupling 30 that further extracts the rotational driving force transmitted to the lubricating oil pump 11 to the outside of the lubricating oil pump housing 15. The third magnetic coupling 30 is configured in the same manner as the first magnetic coupling, and includes a third outer cylinder 31 provided in the lubricating oil pump housing 15 and a driven shaft of the generator 8. The lubricating oil pump is provided with a third insertion body 32 provided at 33, and is loosely inserted into the third outer cylindrical body 31 so that a magnetic attractive force acts between them. The rotational driving force transmitted to the 11 rotation shafts can be transmitted to the driven shaft 33 of the generator 8.

  Also in the power generation facility 1 of the second embodiment, on the one power transmission system 12 that transmits the rotational driving force generated by the expander 2, various auxiliary machines such as the expander 2 and the working medium pump 5, and the generator 8 are provided. The housing (partition) is permeated between the expander 2 and the working medium pump 5, between the working medium pump 5 and the lubricating oil pump 11, and between the lubricating oil pump 11 and the generator 8. Since the first magnetic coupling 17 to the third magnetic coupling 30 capable of inducing magnetic attraction are provided, the housing 13 of the expander 2 and the working medium pump housing 14 or the working medium pump are provided. Thus, it is possible to transmit power efficiently while isolating the housing 14 and the lubricating oil pump housing 15 from each other.

Moreover, in 2nd Embodiment, since the generator 8 exists in the housing 13 of the expander 2, and the housings 14 and 15 for pumps, there also exists an advantage that work, such as a maintenance with respect to the generator 8, can be performed easily.
In addition, since the other structure and effect in 2nd Embodiment are the same as 1st Embodiment, detailed description is abbreviate | omitted.
“Third Embodiment”
Next, the power generation facility 1 according to the third embodiment of the present invention will be described.

  As shown in FIG. 4, the power generation facility 1 of the third embodiment includes a cooling water pump 10 and a hot water pump 9 as an auxiliary machine provided on the power transmission system 12 instead of the working medium pump 5 and the lubricating oil pump 11. It is what was used. That is, on one power transmission system 12 extending from the expander 2, the expander 2, the generator 8, the cooling water pump 10, and the hot water pump 9 are arranged in order. A part of the electric power generated by the generator 8 is sent to the working medium pump 5 and the lubricating oil pump 11 and supplied to an external load.

Specifically, in the power generation facility 1 of the third embodiment, a cooling water pump 10 is provided at a position corresponding to the working medium pump 5 of the first embodiment, and corresponds to the lubricating oil pump 11 of the first embodiment. A hot water pump 9 is provided at a position to perform.
The cooling water pump 10 includes a first insertion body 19 of the first magnetic coupling 17, a cooling water pump rotor 35 for circulating the cooling water, and a second magnetism in the cooling water pump housing 34 (partition wall). The second outer cylinder body 23 of the coupling 30 is connected to the cooling water pump rotating shaft 36.

The hot water pump 9 is connected to a hot water pump rotary shaft 39 with a second insert 24 of the second magnetic coupling 22 and a hot water pump rotor 38 for circulating hot water in a hot water pump housing 37 (partition wall). Have in a state.
Also in the power generation facility 1 of the third embodiment, it is possible to increase the efficiency of the entire facility by using the rotational driving force obtained by the expander not only for power generation by the generator but also for operating the auxiliary machinery. It becomes.

Since other configurations in the third embodiment are substantially the same as those in the first embodiment, detailed description thereof is omitted.
“Fourth Embodiment”
Next, the power generation equipment 1 according to the fourth embodiment of the present invention will be described.
As shown in FIG. 5, the power generation facility 1 of the fourth embodiment is obtained by changing the arrangement of the generator 8 in the power generation facility 1 of the third embodiment. In other words, the power generation facility 1 of the fourth embodiment uses the cooling water pump 10 and the hot water pump 9 as auxiliary machines as in the third embodiment.

The power generation facility 1 of the fourth embodiment is different from the third embodiment in that the expander 2, the cooling water pump 10, the hot water pump 9, and the generator 8 are sequentially arranged on one power transmission system 12 extending from the expander 2. It is a point that is lined up. That is, the generator 8 is arranged behind the hot water pump 9 (on the side away from the expander 2), and the rotational driving force transmitted to the hot water pump 9 is transmitted between the hot water pump 9 and the generator 8 in the housing 37. The 3rd magnetic coupling 30 taken out outside is provided. The third magnetic coupling 30 is configured in the same manner as the first magnetic coupling, and includes a third outer cylinder 31 provided in the housing 37 of the hot water pump 9 and a driven shaft of the generator 8. And a third insert 32 provided at 33. The third insertion body 32 is inserted into the third outer cylinder 31 and is integrally rotated by a magnetic coupling force.

In addition to the effect of the third embodiment, the power generation facility 1 of the fourth embodiment described above has the effect as in the power generation facility 1 of the second embodiment, that is, the effect that the generator 8 can be easily maintained. It is also possible.
In addition, since the other structure and effect in 4th Embodiment are substantially the same as 3rd Embodiment, detailed description is abbreviate | omitted.
“Fifth Embodiment” “Sixth Embodiment”
Next, the power generation equipment 1 of 5th Embodiment and 6th Embodiment of this invention is demonstrated.

As shown in FIG.6 and FIG.7, the power generation equipment 1 of 5th and 6th embodiment uses all the auxiliary machines quoted by 2nd Embodiment and 3rd Embodiment.
That is, the power generation facility 1 of the fifth embodiment uses all of the working medium pump 5, the lubricating oil pump 11, the cooling water pump 10, and the hot water pump 9 as auxiliary machines, and one power transmission system 12 extending from the expander 2. All these four auxiliary machines are equipped. These four auxiliary machines are hermetically connected so that the interiors of the housings are isolated by the four magnetic couplings of the first magnetic coupling 17 to the fourth magnetic coupling 40.

That is, in the power generation facility 1 of the fifth embodiment, the rotational driving force generated in the expander 2 is first used for driving the generator 8, that is, power generation, and the remaining rotational driving force not used for power generation is used as the working medium pump. 5. Used to drive all of the lubricating oil pump 11, the cooling water pump 10, and the hot water pump 9.
In the power generation facility 1 of the sixth embodiment, the rotational driving force generated by the expander 2 is used to drive all of the working medium pump 5, the lubricating oil pump 11, the cooling water pump 10, and the hot water pump 9. The remainder of the rotational driving force that has not been used in these auxiliary machines is sent to the generator 8, and the generator 8 is driven using the remaining rotational driving force to generate power.

In the power generation equipment 1 of the fifth and sixth embodiments, since all the power necessary for the operation of the auxiliary machine can be covered by the rotational driving force generated by the expander 2, the motor that drives the auxiliary machine with the generated power Is unnecessary and power generation efficiency is high.
In addition, since the other structure and effect in 5th and 6th embodiment are the same as 1st-4th embodiment, detailed description is abbreviate | omitted.
“Seventh and Eighth Embodiments”
Next, the power generation equipment 1 according to the seventh embodiment of the present invention will be described.

  As shown in FIG. 8, the power generation facility 1 of the seventh embodiment is one in which the number of magnetic couplings used is reduced as much as possible. In other words, the power generation facility 1 of the seventh embodiment includes the working medium pump 5 and the lubricating oil pump 11 that handle the working medium T and the lubricating oil, which have few problems even if they are somewhat mixed with each other, in one housing (the housing of the expander 2). 13) The cooling water pump 10 and the hot water pump 9 that use the same water as a circulation medium, which is accommodated in the interior and has little problem even if mixed somewhat, are accommodated in one pump housing 41.

  Specifically, a drive shaft 16 facing in the horizontal direction is provided inside the housing 13 of the expander 2, and on this drive shaft 16, the screw rotor 7, the generator 8, and the working medium of the expander 2. A pump rotor 21 and a lubricating oil pump rotor 25 are provided in order from the expander 2 side. Between the working medium pump rotor 21 and the generator 8 screw rotor 7 and between the working medium pump rotor 21 and the lubricating oil pump rotor 25, the working medium T or A shaft seal mechanism 42 that rotatably supports the drive shaft 16 while suppressing leakage of the lubricating oil is provided.

In the pump housing 41, a cooling water pump rotor 35 and a hot water pump rotor 38 are arranged on a driven shaft 33 that faces in the horizontal direction. Between these pump rotors, there is also provided a shaft seal mechanism 42 that rotatably supports the driven shaft while suppressing leakage of water (cooling water and hot water) in the housings in which the pump rotors are housed. It has been.

  If the screw rotor 7, the generator 8, the working medium pump rotor 21, the lubricating oil pump rotor 25, and the like of the expander 2 are housed together in one housing as in the seventh embodiment described above, for example, the working medium T The working medium pump 5 and the lubricating oil pump 11 that can be used without any problem even if the lubricating oil is mixed to some extent are housed in one housing 13 and a shaft seal mechanism 41 is provided between them. Therefore, the number of magnetic couplings can be reduced as much as possible without causing the working medium T to leak out of the facility.

Moreover, even if the generator 8 is provided outside the housing 13 of the expander 2 as in the power generation facility 1 of the eighth embodiment shown in FIG. 9, the same effects as those of the seventh embodiment can be obtained.
In the seventh embodiment and the eighth embodiment, it is preferable that the discharge sides of the working medium pump rotor 21 and the lubricating oil pump rotor 25 are arranged so as to face each other with the shaft seal mechanism 42 interposed therebetween. It is preferable that the discharge sides of the water pump rotor 35 and the hot water pump rotor 38 are arranged so as to face each other with the shaft seal mechanism 42 interposed therebetween. By doing so, the pressure difference between the two housings sandwiching the seal mechanism 42 can be reduced, so that the working medium T and the lubricating oil leak between the adjacent housings, or the cooling water and the hot water leak. Can be reduced as much as possible.

In addition, since the other structure and effect in 7th Embodiment and 8th Embodiment are the same as embodiment mentioned above, detailed description is abbreviate | omitted.
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. In particular, in the embodiment disclosed this time, matters that are not explicitly disclosed, for example, operating conditions and operating conditions, various parameters, dimensions, weights, volumes, and the like of a component deviate from a range that a person skilled in the art normally performs. Instead, values that can be easily assumed by those skilled in the art are employed. In the first embodiment, the second embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, and the eighth embodiment, an example in which the lubricating oil pump 11 is provided on the power transmission system 12. However, the lubricating oil pump 11 may be provided as necessary. Further, in each of the above-described embodiments, a partition wall (a housing of the part) located between the outer cylinder body and the interior body of the magnetic coupling is provided for each adjacent device with the magnetic coupling interposed therebetween. However, the housings of adjacent devices may be isolated from each other by a single shared partition. Furthermore, it is desirable that the partition wall is formed of a nonmagnetic material at least between the magnetic coupling outer cylinder and the insertion member. In this way, the partition wall separating the outer cylindrical body and the inner insertion body of the magnetic coupling is made nonmagnetic, so that the magnetic attractive force between the magnets provided on the outer cylindrical body and the inner insertion body can be reduced. Since the decrease due to the eddy current loss can be almost eliminated, the power transmission efficiency can be effectively prevented from decreasing.

DESCRIPTION OF SYMBOLS 1 Power generation equipment 2 Expander 3 Evaporator 4 Condenser 5 Working medium pump 6 Circulation piping 7 Screw rotor 8 Generator 9 Hot water pump 10 Cooling water pump 11 Lubricating oil pump 12 Power transmission system 13 Housing of expander 14 For working medium pump Housing 15 Lubricating oil pump housing 16 Drive shaft 17 First magnetic coupling 18 First outer cylinder 19 First insertion body 20 Working medium pump rotating shaft 21 Working medium pump rotor 22 Second magnetic coupling 23 Second outer cylinder Body 24 Second insert 25 Lubricating oil pump rotor 26 Lubricating oil pump rotating shaft 27 Drive side magnet 28 Driven side magnet 30 Third magnetic coupling 31 Third outer cylinder 32 Third insert 33 33 Driven shaft of generator 34 Housing for cooling water pump 35 Rotor for cooling water pump 36 Cooling water pump rotary shaft 37 For hot water pump Ujingu 38 hot water pump rotor 39 hot water pump rotary shaft 40 fourth magnetic coupling 41 pump housing 42 shaft sealing mechanism

Claims (5)

An evaporator that evaporates the working medium, an expander that generates a rotational driving force by expanding the vapor of the working medium evaporated by the evaporator, and condenses the vapor of the working medium expanded by the expander into a liquid A condenser and a working medium pump that circulates the working medium of the liquid condensed by the condenser are provided on a closed loop circulation pipe, and the generator is driven using the rotational driving force of the expander. Power generation equipment,
Having one power transmission system for transmitting the rotational driving force generated by the expander;
The power generation facility, wherein the power generator and a rotationally driven auxiliary device incidental to the power generation facility are arranged on the one power transmission system. The auxiliary machine is provided between the expander and the generator,
The rotational driving force generated in the expander is transmitted to the auxiliary device, and the rotational driving force transmitted to the auxiliary device is further transmitted to the generator. The described power generation equipment. The generator is provided between the expander and the auxiliary machine,
The rotational driving force generated by the expander is transmitted to the generator, and the rotational driving force transmitted to the generator is further transmitted to the auxiliary device. The described power generation equipment.   The power generation facility according to claim 2 or 3, wherein a magnetic coupling is used for power transmission between at least one of the expander, the auxiliary device, and the generator.   The auxiliary machine supplies the working medium pump, a lubricating oil pump that circulates the lubricating oil of the expander, a hot water pump that supplies hot water to the evaporator to heat the working medium, and supplies cooling water to the condenser. The power generation facility according to claim 1, wherein the power generation facility is any one or more of cooling water pumps that condense the working medium.