JP2013083169A - Power generating apparatus - Google Patents

Power generating apparatus Download PDF

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JP2013083169A
JP2013083169A JP2011222032A JP2011222032A JP2013083169A JP 2013083169 A JP2013083169 A JP 2013083169A JP 2011222032 A JP2011222032 A JP 2011222032A JP 2011222032 A JP2011222032 A JP 2011222032A JP 2013083169 A JP2013083169 A JP 2013083169A
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oil
generator
working medium
rotor
expander
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JP5492170B2 (en
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Noboru Tsuboi
昇 壷井
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Kobe Steel Ltd
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Kobe Steel Ltd
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Priority to JP2011222032A priority Critical patent/JP5492170B2/en
Priority to CN201210370952.3A priority patent/CN103036361B/en
Priority to KR1020120110669A priority patent/KR101389650B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/10—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F01C1/107—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/04—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/06—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a power generating apparatus with high power generation efficiency, that can cool a power generator.SOLUTION: The power generating apparatus includes: an evaporator 1 that evaporates a working medium; an expander 2 that is lubricated with oil, converts an expansion force of the working medium evaporated in the evaporator 1 into a rotational force, and discharges the expanded working medium through an exhaust flow passage 11; an oil separator 3 that separates oil from the working medium discharged from the expander 2; a condenser 4 that condenses the working medium from which the oil is separated by the oil separator 3; a circulation pump 5 that pressurizes the working medium condensed by the condenser 4 and refluxes the medium into the evaporator; a power generator 7 having a generator chamber 15 that accommodates a stator 16 and a rotor 17 driven by the expander 2; and an oil pump 12 that pressurizes the oil separated by the oil separator 3 and refluxes the oil to the expander 2. A part of the oil pressurized by the oil pump 12 is supplied to the generator chamber 15 to cool the rotor 17 and the stator 16, and then is discharged to the exhaust flow passage 11.

Description

本発明は、ランキンサイクルを用いた発電装置に関する。   The present invention relates to a power generator using a Rankine cycle.

蒸発器、膨張機、凝縮器および循環ポンプを介設した流路に封入した作動媒体を循環させることで、蒸発器で受け取った熱エネルギーを膨張機において回転力に変換するランキンサイクルを用いた発電装置が公知である。   Power generation using a Rankine cycle that converts thermal energy received in the evaporator into rotational force in the expander by circulating the working medium enclosed in the flow path through the evaporator, expander, condenser, and circulation pump Devices are known.

一般に、発電機において、巻線温度が過度に上昇すると、発電効率が低下する。そのため、ランキンサイクルを用いた発電装置でも、発電機の冷却を行うことが望ましい。発電機を冷却する方法としては、発電機のハウジングに水冷ジャケットを設けて、冷却水を挿通することによってハウジングを介して内部の巻線を冷却する方法が考えられる。   Generally, in a generator, when the winding temperature rises excessively, the power generation efficiency decreases. Therefore, it is desirable to cool the generator even in a power generator using the Rankine cycle. As a method for cooling the generator, a method may be considered in which a water cooling jacket is provided in the housing of the generator and the internal windings are cooled through the housing by inserting cooling water.

しかしながら、特許文献１に記載されているように、発電機の固定子と回転子との間にキャンを挿入した場合、水冷ジャケットによる冷却だけでは、回転子の温度上昇を十分に抑制することができない。   However, as described in Patent Document 1, when a can is inserted between the stator and the rotor of the generator, the temperature rise of the rotor can be sufficiently suppressed only by cooling with the water cooling jacket. Can not.

特許文献２には、循環ポンプで加圧した作動媒体の一部を発電機のジャケットに挿通する発明が記載されている。この構成では、発電機を冷却した作動媒体を凝縮器に環流させる必要があるので配管が複雑になり、また、循環ポンプや凝縮器の負荷が大きくなるので発電効率が低下するという問題がある。   Patent Document 2 describes an invention in which a part of a working medium pressurized by a circulation pump is inserted through a jacket of a generator. In this configuration, since it is necessary to circulate the working medium that has cooled the generator to the condenser, the piping becomes complicated, and the load on the circulation pump and the condenser increases, resulting in a problem that power generation efficiency is reduced.

特開平５−９８９０２号公報Japanese Patent Laid-Open No. 5-98902 特開２００４−３５３５７１号公報JP 2004-353571 A

前記問題点に鑑みて、本発明は、発電機を冷却できる発電効率の高い発電装置を提供することを課題とする。   In view of the above problems, an object of the present invention is to provide a power generation device with high power generation efficiency that can cool a generator.

前記課題を解決するために、本発明による発電装置は、作動媒体を蒸発させる蒸発器と、油で潤滑され、前記蒸発器において蒸発した前記作動媒体の膨張力を回転力に変換し、膨張した前記作動媒体を排気流路を介して排出する膨張機と、前記膨張機から排出された前記作動媒体から油を分離する油分離器と、前記油分離器で油を分離した前記作動媒体を凝縮させる凝縮器と、前記凝縮器で凝縮した前記作動媒体を加圧して前記蒸発器に環流させる循環ポンプと、前記膨張機によって駆動される回転子および固定子を収容した発電機室を備える発電機と、前記油分離器が分離した前記油を加圧して前記膨張機に環流させる油ポンプとを有し、前記油ポンプが加圧した油の一部を、前記発電機室に供給し、前記回転子および固定子を冷却し、前記排気流路に排出するものとする。   In order to solve the above-described problems, an electric power generation apparatus according to the present invention expands by converting an expansion force of the working medium evaporated with the evaporator that evaporates the working medium and oil and evaporated in the evaporator into a rotational force. An expander that discharges the working medium through an exhaust passage, an oil separator that separates oil from the working medium discharged from the expander, and the working medium that has separated the oil by the oil separator is condensed A generator comprising: a condenser to be operated; a circulation pump for pressurizing the working medium condensed in the condenser and circulating to the evaporator; and a generator chamber containing a rotor and a stator driven by the expander And an oil pump that pressurizes the oil separated by the oil separator and causes the expander to circulate, and supplies a part of the oil pressurized by the oil pump to the generator chamber, Cooling and rotating rotor and stator It shall be discharged into the exhaust passage.

この構成によれば、油によって発電機の回転子および固定子を直接冷却するので、冷却効率が高い。また、発電機の冷却に作動媒体を使用しないので、ランキンサイクルの熱効率を悪化させず、冷媒配管も複雑化しない。   According to this configuration, since the rotor and stator of the generator are directly cooled by oil, the cooling efficiency is high. Further, since no working medium is used for cooling the generator, the thermal efficiency of the Rankine cycle is not deteriorated, and the refrigerant piping is not complicated.

また、本発明の発電装置は、前記油ポンプが加圧した油の一部を前記発電機室に供給するための流路に設けた油制御弁と、前記固定子の温度を検出する温度センサとを備え、前記温度センサの検出値が所定温度より高い場合には、前記油制御弁を開放してもよい。   The power generation device of the present invention includes an oil control valve provided in a flow path for supplying a part of the oil pressurized by the oil pump to the generator chamber, and a temperature sensor that detects the temperature of the stator. When the detected value of the temperature sensor is higher than a predetermined temperature, the oil control valve may be opened.

この構成によれば、固定子の温度が高いときだけ、発電機室に油を供給して冷却するので、固定子の温度を所定温度以下に保持できる。   According to this configuration, oil is supplied to the generator chamber and cooled only when the temperature of the stator is high, so that the temperature of the stator can be kept below a predetermined temperature.

また、本発明の発電装置において、前記発電機室の底部の前記回転子の回転軸方向の一端側に、前記排気流路に連通する油排出口が形成され、前記発電機室の前記回転子の回転軸方向の他端側に、前記油を供給するための油供給口が形成されていてもよい。   Further, in the power generator of the present invention, an oil discharge port communicating with the exhaust passage is formed at one end side in the rotation axis direction of the rotor at the bottom of the generator chamber, and the rotor of the generator chamber is formed. An oil supply port for supplying the oil may be formed on the other end side in the rotation axis direction.

この構成によれば、圧力差によって、油が回転子と固定子との間を通過するので、冷却効率が高い。   According to this configuration, because the oil passes between the rotor and the stator due to the pressure difference, the cooling efficiency is high.

また、本発明の発電装置において、前記発電機は、冷却水が挿通されるジャケットを備えてもよい。   Moreover, the electric power generating apparatus of this invention WHEREIN: The said generator may be provided with the jacket by which cooling water is penetrated.

この構成によれば、ジャケットを使用した水冷も併用するので、冷却能力が高い。   According to this configuration, since water cooling using a jacket is also used, the cooling capacity is high.

また、本発明の発電装置において、前記発電機室を画定する発電機ハウジングの外形が略直方体状であり、前記発電機ハウジングには、前記回転子の回転軸と略平行な４つの面に沿って延伸して両端に開口を形成する複数の貫通穴からなる冷却水路が設けられ、前記開口のいくつかを冷却水を給排水するための水入口および水出口とし、他の前記開口を封止してもよい。   In the power generator of the present invention, the outer shape of the generator housing that defines the generator chamber is a substantially rectangular parallelepiped shape, and the generator housing has four surfaces substantially parallel to the rotation axis of the rotor. A cooling water channel comprising a plurality of through holes extending to form openings at both ends is provided, and some of the openings are used as water inlets and water outlets for supplying and discharging cooling water, and the other openings are sealed. May be.

この構成によれば、冷却水路の加工が非常に容易である。また、発電機ハウジングの外部に位置する、冷却水の管路等の設計上の自由度が高い。   According to this configuration, the processing of the cooling water channel is very easy. In addition, the degree of freedom in designing the cooling water pipes and the like located outside the generator housing is high.

以上のように、本発明によれば、発電機の回転子および固定子を油によって直設冷却するので、冷却効率が高く、装置の構成も複雑にならない。   As described above, according to the present invention, the rotor and stator of the generator are directly cooled by oil, so that the cooling efficiency is high and the configuration of the apparatus is not complicated.

本発明の第１実施形態の発電装置の構成図である。It is a lineblock diagram of the power generator of a 1st embodiment of the present invention. 本発明の第２実施形態の発電装置の構成図である。It is a block diagram of the electric power generating apparatus of 2nd Embodiment of this invention. 図２の発電機ハウジングの水入口における軸直角断面図である。FIG. 3 is a cross-sectional view perpendicular to the axis of a water inlet of the generator housing of FIG. 2. 図２の発電機ハウジングの水出口における軸直角断面図である。FIG. 3 is a cross-sectional view perpendicular to the axis at the water outlet of the generator housing of FIG. 2.

これより、本発明の実施形態について、図面を参照しながら説明する。図１に示すように、本発明の第１実施形態に係る発電装置は、蒸発器１とスクリュ膨張機２と、油分離器３と、凝縮器４と、循環ポンプ５とを介設してなり、作動媒体（例えばＲ２４５ｆａ）が封入された循環流路６を有する。スクリュ膨張機２は、発電機７を駆動するようになっている。   Embodiments of the present invention will now be described with reference to the drawings. As shown in FIG. 1, the power generation apparatus according to the first embodiment of the present invention includes an evaporator 1, a screw expander 2, an oil separator 3, a condenser 4, and a circulation pump 5. And has a circulation channel 6 in which a working medium (for example, R245fa) is enclosed. The screw expander 2 drives the generator 7.

スクリュ膨張機２は、膨張機ハウジング８の中に雌雄一対のスクリュロータ９を収容し、給気流路１０から蒸発器１で熱源と熱交換して蒸発させられた作動媒体が供給され、作動媒体の膨張力をスクリュロータ９の回転力に変換し、膨張して圧力が低下した作動媒体を排気流路１１から排出する。   The screw expander 2 accommodates a pair of male and female screw rotors 9 in an expander housing 8 and is supplied with a working medium evaporated from the air supply passage 10 by exchanging heat with a heat source in the evaporator 1. The expansion force is converted into the rotational force of the screw rotor 9, and the working medium that has expanded and the pressure has decreased is discharged from the exhaust passage 11.

また、スクリュ膨張機２は、潤滑油によって潤滑およびシールを行う油潤滑式スクリュ膨張機であり、給気流路１０やスクリュロータ９の軸受等に潤滑油が供給されるようになっている。よって、排気流路１１から排出される作動媒体には潤滑油が含まれており、油分離器３は、作動媒体から潤滑油を分離するために設けられている。そして、油分離器３で分離した潤滑油は、油ポンプ１２によって加圧されて油供給流路１３を介して、スクリュ膨張機２に再供給されるようになっている。   The screw expander 2 is an oil-lubricated screw expander that performs lubrication and sealing with lubricating oil, and the lubricating oil is supplied to the air supply passage 10 and the bearings of the screw rotor 9. Therefore, the working fluid discharged from the exhaust passage 11 contains lubricating oil, and the oil separator 3 is provided to separate the lubricating oil from the working medium. The lubricating oil separated by the oil separator 3 is pressurized by the oil pump 12 and re-supplied to the screw expander 2 via the oil supply passage 13.

油分離器３で潤滑油が分離除去された作動媒体は、凝縮器４において冷却源によって冷却されることにより凝縮する。凝縮した作動媒体は、循環ポンプ５によって加圧されて蒸発器１に再供給される。   The working medium from which the lubricating oil is separated and removed by the oil separator 3 is condensed by being cooled by the cooling source in the condenser 4. The condensed working medium is pressurized by the circulation pump 5 and re-supplied to the evaporator 1.

発電機７は、スクリュ膨張機２の膨張機ハウジング８に一体に接続された発電機ハウジング１４を有し、発電機ハウジング１４によって画定され、膨張機ハウジング８によって一端が封止された発電機室１５の中に、固定子１６および回転子１７を収容している。回転子１７の軸は、スクリュロータ９の一方の軸と一体である。また、発電機ハウジング１４の外側には、冷却水が挿通される冷却ジャケット１８が設けられている。   The generator 7 includes a generator housing 14 that is integrally connected to the expander housing 8 of the screw expander 2. The generator chamber is defined by the generator housing 14 and sealed at one end by the expander housing 8. The stator 16 and the rotor 17 are accommodated in 15. The axis of the rotor 17 is integral with one axis of the screw rotor 9. A cooling jacket 18 through which cooling water is inserted is provided outside the generator housing 14.

発電機室１５を回転子１７の回転軸方向の一端側で封止する膨張機ハウジング８には、発電機室１５の底部と排気流路１１とを連通させる油排出口１９が設けられている。また、発電機ハウジング１４には、回転子１７の回転軸方向の他端側の上部において発電機室１５に開口する油供給口２０が設けられている。   The expander housing 8 that seals the generator chamber 15 at one end in the rotation axis direction of the rotor 17 is provided with an oil discharge port 19 that allows the bottom of the generator chamber 15 to communicate with the exhaust passage 11. . Further, the generator housing 14 is provided with an oil supply port 20 that opens to the generator chamber 15 at the upper portion on the other end side in the rotation axis direction of the rotor 17.

油供給口２０には、油供給流路１３から分岐し、油制御弁２１が介設された冷却油流路２２を介して、潤滑油が供給されるようになっている。油制御弁２１は、固定子１６の温度を検出するように配設された温度センサ２３の検出値が設定温度に達すると開放される。   Lubricating oil is supplied to the oil supply port 20 via a cooling oil passage 22 branched from the oil supply passage 13 and provided with an oil control valve 21. The oil control valve 21 is opened when the detected value of the temperature sensor 23 arranged to detect the temperature of the stator 16 reaches a set temperature.

つまり、発電機７の固定子１６および回転子１７は、先ずは冷却ジャケットを挿通する冷却水によって発電機ハウジング１４を介して間接的に冷却される。そして、固定子１６の温度が高くなると、油供給口２０から潤滑油が供給されるので、固定子１６および回転子１７は、潤滑油に直接接触してさらに冷却される。このため、固定子１６のさらなる温度上昇が防止されるので、温度センサ２３の検出値は、略その設定値以下に維持される。   That is, the stator 16 and the rotor 17 of the generator 7 are first indirectly cooled through the generator housing 14 by the cooling water that passes through the cooling jacket. When the temperature of the stator 16 is increased, the lubricating oil is supplied from the oil supply port 20, so that the stator 16 and the rotor 17 are directly contacted with the lubricating oil and further cooled. For this reason, since further temperature rise of the stator 16 is prevented, the detection value of the temperature sensor 23 is maintained substantially below the set value.

発電機室１５に供給された潤滑油は、固定子１６と回転子１７との間を通って、発電機室１５内を横断し、油排出口１９から排気流路１１に流出する。そして、発電機室１５から流出した潤滑油は、作動媒体によって、スクリュ膨張機２に供給された潤滑油とともに、油分離器３に運ばれて作動媒体から分離される。したがって、本発明では、潤滑油を発電機室１５から油ポンプ１２に環流させるために専用の流路を設ける必要がない。   The lubricating oil supplied to the generator chamber 15 passes between the stator 16 and the rotor 17, traverses the generator chamber 15, and flows out from the oil discharge port 19 to the exhaust passage 11. The lubricating oil that has flowed out of the generator chamber 15 is transported to the oil separator 3 along with the lubricating oil supplied to the screw expander 2 by the working medium, and is separated from the working medium. Therefore, in the present invention, it is not necessary to provide a dedicated flow path for circulating the lubricating oil from the generator chamber 15 to the oil pump 12.

本発明では、発電機７の冷却のために作動媒体を使用しないので、作動媒体のランキンサイクルの熱効率に影響を与えない。また、凝縮器４や循環ポンプ５等の構成要素に、ランキンサイクルの負荷以上に大きな容量を要求されることもなく、装置がコスト高にならない。   In the present invention, since the working medium is not used for cooling the generator 7, the thermal efficiency of the Rankine cycle of the working medium is not affected. Further, the components such as the condenser 4 and the circulation pump 5 are not required to have a larger capacity than the Rankine cycle load, and the cost of the apparatus does not increase.

本実施形態では、発電機７の冷却のために、冷却ジャケット１８に挿通する水冷も併用するが、冷却ジャケット１８を省略して、潤滑油のみで発電機７を冷却してもよい。また、固定子１６と回転子１７との間にキャンを挿入する場合には、油排出口１９および油供給口２０をキャンの内側の空間に開口するように設け、固定子１６を主に冷却ジャケットによって冷却し、回転子１７を主に潤滑油によって冷却するようにしてもよい。   In the present embodiment, water cooling inserted into the cooling jacket 18 is also used for cooling the generator 7, but the cooling jacket 18 may be omitted and the generator 7 may be cooled only with lubricating oil. Further, when a can is inserted between the stator 16 and the rotor 17, the oil discharge port 19 and the oil supply port 20 are provided so as to open in the space inside the can, and the stator 16 is mainly cooled. The rotor 17 may be cooled mainly by lubricating oil by cooling with a jacket.

続いて、図２乃至４に、本発明の第２実施形態の発電装置を示す。尚、本実施形態において、第１実施形態と同じ構成要素には同じ符号を付して、重複する説明を省略する。図３および４は、図２の発電装置の発電機ハウジング１４の軸直角方向の断面図である。   Next, FIGS. 2 to 4 show a power generator according to a second embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. 3 and 4 are cross-sectional views in the direction perpendicular to the axis of the generator housing 14 of the power generator of FIG.

上記第１実施形態においては、発電機ハウジング１４の外側に冷却水が挿通される冷却ジャケット１８が設けられていたが、本実施形態においては、発電機ハウジング１４の外形が略直方体状に形成され、その発電機ハウジング１４に、冷却ジャケット１８を設ける替わりに、冷却水が挿通される複数の円柱状の穴からなる冷却水路２４が形成されている。冷却水路２４は、水入口２５および水出口２６を有しており、図３および図４は、水入口および水出口における断面を示す。   In the first embodiment, the cooling jacket 18 through which the cooling water is inserted is provided outside the generator housing 14, but in the present embodiment, the outer shape of the generator housing 14 is formed in a substantially rectangular parallelepiped shape. Instead of providing the cooling jacket 18 in the generator housing 14, a cooling water channel 24 composed of a plurality of cylindrical holes through which the cooling water is inserted is formed. The cooling water channel 24 has a water inlet 25 and a water outlet 26, and FIGS. 3 and 4 show cross sections at the water inlet and the water outlet.

図３および４に示すように、冷却水路２４は、略直方体状に形成された発電機ハウジング１４の面のうち、発電機７の回転子１７の回転軸と略平行な径方向に位置する４つの面が互いに交差する角に沿って延伸する４本の接続流路２４ａと、各面に沿って回転軸と直角な方向に延伸し、互いに交差するとともに接続流路２４ａと交差する周回流路２４ｂとからなる。周回流路２４ｂは、発電機ハウジング１４を貫通して、両端が開口を形成するように形成されている。周回流路２４ｂの両端の開口は、水入口２５および水出口２６となるものを残して、プラグ２７によって封止されている。水入口２５と水出口２６とは、対角線上に位置するように選択することが好ましい。   As shown in FIGS. 3 and 4, the cooling water passage 24 is located in a radial direction substantially parallel to the rotation axis of the rotor 17 of the generator 7 in the surface of the generator housing 14 formed in a substantially rectangular parallelepiped shape. Four connection flow paths 24a extending along an angle at which two surfaces intersect each other, and a circular flow path extending in a direction perpendicular to the rotation axis along each surface, intersecting each other and intersecting the connection flow path 24a 24b. The circumferential flow path 24b penetrates the generator housing 14 and is formed so that both ends form openings. The openings at both ends of the circulation channel 24 b are sealed by plugs 27, leaving what will be the water inlet 25 and the water outlet 26. It is preferable to select the water inlet 25 and the water outlet 26 so as to be located on a diagonal line.

図３および４に矢印で示すとおり、冷却水は、水入口２５から発電機ハウジング１４に導入される。次いで、冷却水は、接続流路２４ａを介して１０本の周回流路２４ｂに分配され、発電機ハウジング１４の径方向の４つの面を通過して、別の接続流路２４ａに合流する。冷却水は、水出口２６から発電機ハウジング１４の外部に導出される。   As shown by the arrows in FIGS. 3 and 4, the cooling water is introduced from the water inlet 25 into the generator housing 14. Next, the cooling water is distributed to the ten circumferential flow paths 24b via the connection flow path 24a, passes through four radial surfaces of the generator housing 14, and merges with another connection flow path 24a. The cooling water is led out of the generator housing 14 from the water outlet 26.

本発明の第１実施形態においては、発電機ハウジング１４の外側に冷却ジャケット１８が設けられていた。この冷却ジャケット１８によって高い冷却の効果を望めるが、冷却ジャケット１８の加工には難がある。これに対し、上述のとおり、本実施形態においては、発電機ハウジング１４が略直方体に形成され、その発電機ハウジング１４に、冷却ジャケット１８に替えて、冷却水が挿通される冷却水路２４が形成されている。本実施形態のようなキリ穴形状の冷却水路２４は、加工が非常に容易である。また、プラグ２７の設け方次第で、水入口２５および水出口２６の位置を自由に変更でき、また水入口２５を複数設けたり、水出口２６を複数設けたりすることもできるので、発電機ハウジング１４の外部に位置する、冷却水の管路等の設計上の自由度が高い。   In the first embodiment of the present invention, the cooling jacket 18 is provided outside the generator housing 14. Although a high cooling effect can be expected by this cooling jacket 18, there is a difficulty in processing the cooling jacket 18. On the other hand, as described above, in this embodiment, the generator housing 14 is formed in a substantially rectangular parallelepiped, and the cooling water passage 24 through which the cooling water is inserted is formed in the generator housing 14 instead of the cooling jacket 18. Has been. The cooling water channel 24 having a hole shape as in this embodiment is very easy to process. Further, depending on how the plug 27 is provided, the positions of the water inlet 25 and the water outlet 26 can be freely changed, and a plurality of water inlets 25 or a plurality of water outlets 26 can be provided. The degree of freedom in design of the cooling water pipes and the like located outside 14 is high.

尚、本実施形態では発電機ハウジング１４が略直方体に形成されている。そのため、本発明の第１実施形態であって、且つ、発電機ハウジング１４が略円筒形に形成されているものに比して、本実施形態のものは、発電機ハウジング１４の厚みを一部大きくせざるを得ない。これにより、冷却の効果の低減や、発電機ハウジング１４の重量の増加が見込まれるが、それらを抑制・解消するため、発電機ハウジング１４を、アルミニウム等の軽量で熱伝導率の高い素材で形成することが好ましい。   In the present embodiment, the generator housing 14 is formed in a substantially rectangular parallelepiped. Therefore, compared with the first embodiment of the present invention, in which the generator housing 14 is formed in a substantially cylindrical shape, the present embodiment has a part of the thickness of the generator housing 14. I have to make it bigger. As a result, a reduction in cooling effect and an increase in the weight of the generator housing 14 are expected, but in order to suppress or eliminate them, the generator housing 14 is formed of a lightweight, high thermal conductivity material such as aluminum. It is preferable to do.

１…蒸発器
２…スクリュ膨張機
３…油分離器
４…凝縮器
５…循環ポンプ
６…循環流路
７…発電機
８…膨張機ハウジング
９…スクリュロータ
１０…給気流路
１１…排気流路
１２…油ポンプ
１３…油供給流路
１４…発電機ハウジング
１５…発電機室
１６…固定子
１７…回転子
１８…冷却ジャケット
１９…油排出口
２０…油供給口
２１…油制御弁
２２…冷却油流路
２３…温度センサ
２４…冷却水路
２４ａ…接続流路
２４ｂ…周回流路
２５…水入口
２６…水出口
２７…プラグ DESCRIPTION OF SYMBOLS 1 ... Evaporator 2 ... Screw expander 3 ... Oil separator 4 ... Condenser 5 ... Circulation pump 6 ... Circulation flow path 7 ... Generator 8 ... Expander housing 9 ... Screw rotor 10 ... Supply air flow path 11 ... Exhaust flow path DESCRIPTION OF SYMBOLS 12 ... Oil pump 13 ... Oil supply flow path 14 ... Generator housing 15 ... Generator room 16 ... Stator 17 ... Rotor 18 ... Cooling jacket 19 ... Oil discharge port 20 ... Oil supply port 21 ... Oil control valve 22 ... Cooling Oil flow path 23 ... Temperature sensor 24 ... Cooling water path 24a ... Connection flow path 24b ... Circulation flow path 25 ... Water inlet 26 ... Water outlet 27 ... Plug

Claims (5)

作動媒体を蒸発させる蒸発器と、
油で潤滑され、前記蒸発器において蒸発した前記作動媒体の膨張力を回転力に変換し、膨張した前記作動媒体を排気流路を介して排出する膨張機と、
前記膨張機から排出された前記作動媒体から油を分離する油分離器と、
前記油分離器で油を分離した前記作動媒体を凝縮させる凝縮器と、
前記凝縮器で凝縮した前記作動媒体を加圧して前記蒸発器に環流させる循環ポンプと、
前記膨張機によって駆動される回転子および固定子を収容した発電機室を備える発電機と、
前記油分離器が分離した前記油を加圧して前記膨張機に環流させる油ポンプとを有し、
前記油ポンプが加圧した油の一部を、前記発電機室に供給し、前記回転子および固定子を冷却し、前記排気流路に排出することを特徴とする発電装置。 An evaporator for evaporating the working medium;
An expander that converts the expansion force of the working medium lubricated with oil and evaporated in the evaporator into a rotational force, and discharges the expanded working medium through an exhaust passage;
An oil separator for separating oil from the working medium discharged from the expander;
A condenser for condensing the working medium separated from the oil by the oil separator;
A circulation pump that pressurizes the working medium condensed in the condenser and circulates it to the evaporator;
A generator comprising a generator chamber containing a rotor and a stator driven by the expander;
An oil pump that pressurizes the oil separated by the oil separator and circulates it to the expander;
A part of the oil pressurized by the oil pump is supplied to the generator chamber, the rotor and the stator are cooled, and discharged to the exhaust passage. 前記油ポンプが加圧した油の一部を前記発電機室に供給するための流路に設けた油制御弁と、
前記固定子の温度を検出する温度センサとを備え、
前記温度センサの検出値が所定温度より高い場合には、前記油制御弁を開放することを特徴とする請求項１に記載の発電装置。 An oil control valve provided in a flow path for supplying a part of the oil pressurized by the oil pump to the generator chamber;
A temperature sensor for detecting the temperature of the stator,
The power generator according to claim 1, wherein when the detected value of the temperature sensor is higher than a predetermined temperature, the oil control valve is opened. 前記発電機室の底部の前記回転子の回転軸方向の一端側に、前記排気流路に連通する油排出口が形成され、前記発電機室の前記回転子の回転軸方向の他端側に、前記油を供給するための油供給口が形成されていることを特徴とする請求項１または２に記載の発電装置。   An oil discharge port communicating with the exhaust passage is formed at one end side in the rotation axis direction of the rotor at the bottom of the generator chamber, and on the other end side in the rotation axis direction of the rotor in the generator chamber. The power generation device according to claim 1, wherein an oil supply port for supplying the oil is formed. 前記発電機は、冷却水が挿通されるジャケットを備えることを特徴とする請求項１から３のいずれかに記載の発電装置。   The power generator according to any one of claims 1 to 3, wherein the generator includes a jacket through which cooling water is inserted. 前記発電機室を画定する発電機ハウジングの外形が略直方体状であり、
前記発電機ハウジングには、前記回転子の回転軸と略平行な４つの面に沿って延伸して両端に開口を形成する複数の貫通穴からなる冷却水路が設けられ、
前記開口のいくつかを冷却水を給排水するための水入口および水出口とし、他の前記開口を封止したことを特徴とする請求項１から３のいずれかに記載の発電装置。 The outer shape of the generator housing that defines the generator chamber is substantially rectangular parallelepiped,
The generator housing is provided with a cooling water channel including a plurality of through holes extending along four surfaces substantially parallel to the rotation axis of the rotor to form openings at both ends,
The power generator according to any one of claims 1 to 3, wherein some of the openings are water inlets and water outlets for supplying and discharging cooling water, and the other openings are sealed.
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