JP7038599B2 - Sealing oil supply device for rotary electric machine - Google Patents

Sealing oil supply device for rotary electric machine Download PDF

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JP7038599B2
JP7038599B2 JP2018092660A JP2018092660A JP7038599B2 JP 7038599 B2 JP7038599 B2 JP 7038599B2 JP 2018092660 A JP2018092660 A JP 2018092660A JP 2018092660 A JP2018092660 A JP 2018092660A JP 7038599 B2 JP7038599 B2 JP 7038599B2
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sealing oil
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rotary electric
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秀聡 池嶋
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Mitsubishi Electric Corp
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Description

本願は、回転電機の密封油供給装置に関し、回転電機の軸封部の密封器に密封油を供給するものである。 The present application relates to a sealing oil supply device of a rotary electric machine, and supplies the sealing oil to a sealer of a shaft seal portion of the rotary electric machine.

従来の回転電機の密封油供給装置として、水素ガスを密封した回転電機の軸封部に設けた密封器へ密封油を供給する密封油供給回路において、密封油供給回路に所定の油量を戻す戻り回路を設けるとともに、戻り回路により戻された密封油を戻り回路における送油圧力によって旋回させ密封油の気泡を除去処理する気泡除去機器と、気泡除去機器により処理された密封油を貯留することにより気泡を分離する気泡分離槽を設けた技術が開示されている（例えば、特許文献１参照）。 As a sealing oil supply device for a conventional rotary electric machine, a predetermined amount of oil is returned to the sealing oil supply circuit in a sealing oil supply circuit that supplies sealing oil to a sealing device provided in a shaft sealing portion of a rotating electric machine that seals hydrogen gas. A return circuit is provided, and a bubble removing device that swirls the sealing oil returned by the return circuit by the oil feeding pressure in the return circuit to remove bubbles in the sealing oil and a sealing oil processed by the bubble removing device are stored. Disclosed is a technique in which a bubble separation tank for separating bubbles is provided (see, for example, Patent Document 1).

特開２００４－７８７６号公報Japanese Unexamined Patent Publication No. 2004-7876

しかしながら、前記特許文献１に示された技術は、密封油内の気泡を除去するのに、戻り回路により戻された密封油を、前記戻り回路における送油圧力によって旋回させ、気泡を除去処理する気泡除去機器が用いられているが、この気泡除去機器は油管回路内に存在する送油圧力により気泡を除去するものであり、油管回路内の送油圧力が何らかの理由によって低下すると気泡を除去する能力も低下するという問題点がある。 However, in the technique shown in Patent Document 1, in order to remove air bubbles in the sealing oil, the sealing oil returned by the return circuit is swirled by the oil feeding pressure in the return circuit to remove air bubbles. A bubble removing device is used, but this bubble removing device removes bubbles by the oil feeding pressure existing in the oil pipe circuit, and removes bubbles when the oil feeding pressure in the oil pipe circuit drops for some reason. There is a problem that the ability is also reduced.

本願は、上記のような課題を解決するための技術を開示するものであり、気泡除去部を空気側密封油系統に設置することで、気泡除去能力の低下を生じることなく、低コスト化、および、小型化した回転電機の密封油供給装置を提供するものである。 The present application discloses a technique for solving the above-mentioned problems, and by installing the bubble removing part in the air-side sealing oil system, the cost can be reduced without reducing the bubble removing ability. Further, the present invention provides a sealed oil supply device for a miniaturized rotary electric machine.

本願に開示される回転電機の密封油供給装置は、回転電機の密封油供給装置であって、前記回転電機の軸封部に設けられた密封器の供給側には密封油供給管が設けられているとともに、排出側には空気側密封油系統と水素側密封油系統とが設けられており、前記密封油供給管を介して前記密封器に供給された密封油が前記密封器を通過後に、前記空気側密封油系統と前記水素側密封油系統とに分離して送出される。前記空気側密封油系統は、前記密封器に接続して設けられた空気側排油管に繋がるループシールタンクと、前記ループシールタンクの排出側に設けられた空気側戻り配管と、前記密封油の気泡を除去する気泡除去部とを備え、前記水素側密封油系統は、前記密封器に接続して設けられた水素側排油管に繋がる油浄化タンクと、前記油浄化タンクの排出側に設けられた戻り管とを備え、前記空気側密封油系統内の前記気泡除去部は、前記空気側戻り配管に設けられた脱気ポンプと、前記脱気ポンプの後段に設けられた真空ポンプとによって構成されるものである。 The sealing oil supply device of the rotary electric machine disclosed in the present application is a sealing oil supply device of the rotary electric machine, and a sealing oil supply pipe is provided on the supply side of the sealer provided in the shaft sealing portion of the rotary electric machine. In addition, an air-side sealing oil system and a hydrogen-side sealing oil system are provided on the discharge side, and after the sealing oil supplied to the sealing device via the sealing oil supply pipe passes through the sealing device. , The air-side sealing oil system and the hydrogen-side sealing oil system are separately delivered. The air-side sealing oil system includes a loop seal tank connected to the air-side oil drain pipe provided connected to the sealer, an air-side return pipe provided on the discharge side of the loop seal tank, and the sealing oil. The hydrogen side sealing oil system is provided on the oil purification tank connected to the hydrogen side oil discharge pipe provided by connecting to the sealer and on the discharge side of the oil purification tank. The air bubble removing portion in the air-side sealing oil system is provided with a return pipe, and is composed of a degassing pump provided in the air-side return pipe and a vacuum pump provided in the subsequent stage of the degassing pump. Is to be done.

本願に開示される回転電機の密封油供給装置は、前記のような構成を採用しているので、油管回路内の送油圧力に左右されず、安定した気泡除去能力を有するとともに、低コスト化、および、小型化が図れる。 Since the sealing oil supply device of the rotary electric machine disclosed in the present application adopts the above-mentioned configuration, it has a stable bubble removing ability and is cost-reduced regardless of the oil supply pressure in the oil pipe circuit. , And miniaturization can be achieved.

実施の形態１による回転電機の密封油供給装置を示す系統図である。It is a system diagram which shows the sealing oil supply device of the rotary electric machine according to Embodiment 1. FIG. 実施の形態２による回転電機の密封油供給装置を示す系統図である。It is a system diagram which shows the sealing oil supply device of the rotary electric machine according to Embodiment 2. 実施の形態３による回転電機の密封油供給装置を示す系統図である。It is a system diagram which shows the sealing oil supply device of the rotary electric machine according to Embodiment 3. FIG.

実施の形態１．
図１は実施の形態１による回転電機の密封油供給装置１００を示す系統図である。図１において、水素ガスが封入された回転電機１には回転軸２の軸封部に密封器３が設けられている。前記密封器３の供給側には密封油を供給する密封油供給管５が設けられているとともに、密封器３の排出側には水素側排油管６と、空気側排油管７とが設けられている。ループシールタンク４が前記空気側排油管７に接続されている。また、油浄化タンク８は前記水素側排油管６に接続されているとともに、油面を所定値に維持するための油面調整弁９が設けられている。 Embodiment 1.
FIG. 1 is a system diagram showing a sealing oil supply device 100 of a rotary electric machine according to the first embodiment. In FIG. 1, the rotary electric machine 1 in which hydrogen gas is sealed is provided with a sealer 3 in the shaft sealing portion of the rotary shaft 2. A sealing oil supply pipe 5 for supplying sealing oil is provided on the supply side of the sealer 3, and a hydrogen side oil discharge pipe 6 and an air side oil discharge pipe 7 are provided on the discharge side of the sealer 3. ing. The loop seal tank 4 is connected to the air side oil drain pipe 7. Further, the oil purification tank 8 is connected to the hydrogen side oil drain pipe 6 and is provided with an oil level adjusting valve 9 for maintaining the oil level at a predetermined value.

前記ループシールタンク４の排出側には空気側戻り配管１０が接続されるとともに、この空気側戻り配管１０には逆流が生じることを防止するため、逆止弁１１を介し脱気ポンプ１２が設けられている。また、前記脱気ポンプ１２と並列に前記油浄化タンク８に繋がる分離弁１７が設けられており、さらに前記油浄化タンク８に接続された戻り管１８が前記脱気ポンプ１２の排出側に設けられている。 An air side return pipe 10 is connected to the discharge side of the loop seal tank 4, and a degassing pump 12 is provided via a check valve 11 in order to prevent a backflow from occurring in the air side return pipe 10. Has been done. Further, a separation valve 17 connected to the oil purification tank 8 is provided in parallel with the degassing pump 12, and a return pipe 18 connected to the oil purification tank 8 is provided on the discharge side of the degassing pump 12. Has been done.

前記脱気ポンプ１２には空気を排出するための空気排気管１９を介して真空ポンプ１３が設けられており、脱気ポンプ１２と真空ポンプ１３とで気泡除去部が構成されている。尚、真空ポンプ１３の後段には排気管２０が接続されている。また、脱気ポンプ１２には密封器３に繋がる前記密封油供給管５が接続されている。この密封油供給管５には前記油浄化タンク８に繋がる戻り管１８が接続されるとともに、安全弁１５を備えた密封油ポンプ１４が設けられ、かつ前記密封器３内で密封油圧が回転電機１の内部の水素ガス圧より所定値だけ高くなるように制御される差圧調整弁１６が設けられている。尚、前述した空気側排油管７と、ループシールタンク４および空気側戻り配管１０、逆止弁１１を介する脱気ポンプ１２と真空ポンプ１３とによって空気側密封油系統を構成しているとともに、水素側排油管６と油浄化タンク８、および戻り管１８とによって水素側密封油系統が構成されている。 The degassing pump 12 is provided with a vacuum pump 13 via an air exhaust pipe 19 for discharging air, and the degassing pump 12 and the vacuum pump 13 form a bubble removing portion. An exhaust pipe 20 is connected to the rear stage of the vacuum pump 13. Further, the sealing oil supply pipe 5 connected to the sealing device 3 is connected to the degassing pump 12. A return pipe 18 connected to the oil purification tank 8 is connected to the sealing oil supply pipe 5, a sealing oil pump 14 provided with a safety valve 15 is provided, and the sealing hydraulic pressure is applied to the rotary electric machine 1 in the sealing device 3. The differential pressure adjusting valve 16 is provided so as to be controlled to be higher than the hydrogen gas pressure inside the water pressure by a predetermined value. The air-side sealing oil system is composed of the above-mentioned air-side oil drain pipe 7, the loop seal tank 4, the air-side return pipe 10, the degassing pump 12 via the check valve 11, and the vacuum pump 13. The hydrogen side sealing oil system is composed of the hydrogen side oil drain pipe 6, the oil purification tank 8, and the return pipe 18.

以上のような構成の回転電機の密封油供給装置１００の動作について説明する。回転電機１には、密封油回路中を循環する密封油が供給されている。この密封油回路における密封器３の排出側には前述した水素側密封油系統と空気側密封油系統とが形成されており、回転電機１の冷却用水素ガスは前記水素側密封油系統を介する油回路を循環している。密封油は密封油ポンプ１４により押し出され、差圧調整弁１６により回転電機１内の水素ガス圧より高い所定値の油圧値となるよう調整されて回転電機１に設けられた密封器３に送出される。この密封器３を介する密封油中の水素ガスを含む油は、水素側排油管６を通り、油浄化タンク８に送出される。 The operation of the sealing oil supply device 100 of the rotary electric machine having the above configuration will be described. The rotary electric machine 1 is supplied with sealing oil that circulates in the sealing oil circuit. The hydrogen-side sealing oil system and the air-side sealing oil system described above are formed on the discharge side of the sealing device 3 in this sealing oil circuit, and the hydrogen gas for cooling of the rotary electric machine 1 passes through the hydrogen-side sealing oil system. It circulates in the oil circuit. The sealing oil is extruded by the sealing oil pump 14, adjusted to a predetermined hydraulic pressure value higher than the hydrogen gas pressure in the rotary electric machine 1 by the differential pressure adjusting valve 16, and sent to the sealer 3 provided in the rotary electric machine 1. Will be done. The oil containing hydrogen gas in the sealing oil via the sealing device 3 is sent to the oil purification tank 8 through the hydrogen side oil drain pipe 6.

空気を含む密封油は、空気側排油管７を通り、ループシールタンク４に送出され、空気側密封油系統を形成する空気側戻り配管１０を通り、脱気ポンプ１２によって密封油から空気が分離される。この分離された空気は空気排気管１９を介し真空ポンプ１３によって外部に排出される。脱気ポンプ１２で脱気された密封油は、密封油供給管５を通り、密封油ポンプ１４に送出された後、回転電機１の密封器３に圧送される。一方、油浄化タンク８に送出された水素ガスを含む密封油は、水素側密封油系統を形成する戻り管１８を通り、密封油ポンプ１４に送り込まれた後、再び密封器３に送出される。この場合、水素ガスを含む密封油は脱気されていない。 The sealing oil containing air passes through the air-side oil drain pipe 7, is sent to the loop seal tank 4, passes through the air-side return pipe 10 forming the air-side sealing oil system, and the air is separated from the sealing oil by the degassing pump 12. Will be done. The separated air is discharged to the outside by the vacuum pump 13 via the air exhaust pipe 19. The sealing oil degassed by the degassing pump 12 passes through the sealing oil supply pipe 5, is sent to the sealing oil pump 14, and then is pressure-fed to the sealing device 3 of the rotary electric machine 1. On the other hand, the sealing oil containing hydrogen gas sent to the oil purification tank 8 passes through the return pipe 18 forming the hydrogen side sealing oil system, is sent to the sealing oil pump 14, and then is sent to the sealing device 3 again. .. In this case, the sealing oil containing hydrogen gas has not been degassed.

このように、実施の形態１による回転電機の密封油供給装置１００は、密封器３の排出側に空気側密封油系統と水素側密封油系統とを設け、空気側密封油系統に設けた脱気ポンプ１２によって空気を含む油のみを送油圧力に左右されることなく安定して脱気するので、水素ガス消費量の低減、脱気処理油量低減による脱気ポンプ容量の削減が可能となり、装置が低コスト化、および、小型化され、さらに回転電機の運転コストの低減ができる。 As described above, the sealing oil supply device 100 of the rotary electric machine according to the first embodiment is provided with an air-side sealing oil system and a hydrogen-side sealing oil system on the discharge side of the sealer 3, and is provided on the air-side sealing oil system. Since only the oil containing air is stably degassed by the air pump 12 without being affected by the oil feeding pressure, it is possible to reduce the hydrogen gas consumption and the degassing pump capacity by reducing the amount of degassed oil. , The cost of the device can be reduced and the size can be reduced, and the operating cost of the rotary electric machine can be reduced.

実施の形態２．
次に、実施の形態２による回転電機の密封油供給装置１００を図２に示す。この実施の形態２は前述した実施の形態１の空気側密封油系統を形成する。空気側戻り配管１０に設けられた逆止弁１１の下流に繋がるとともに、脱気ポンプ１２の排出側に繋がり脱気ポンプ１２と並列回路を形成するようなバイパス配管２１を追加して設けたもので、他は記述の実施の形態１と同様である。このような構成を採用しているので、脱気ポンプ１２から送出される油の一部分を脱気ポンプ１２の入り口に再び循環させ、油内に残存するより細かな空気の泡についても再び脱気ポンプ１２で分離することが可能となる。 Embodiment 2.
Next, FIG. 2 shows the sealing oil supply device 100 of the rotary electric machine according to the second embodiment. This second embodiment forms the air-side sealing oil system of the first embodiment described above. A bypass pipe 21 that is connected to the downstream side of the check valve 11 provided in the air side return pipe 10 and is connected to the discharge side of the degassing pump 12 to form a parallel circuit with the degassing pump 12 is additionally provided. Others are the same as those in the first embodiment of the description. Since such a configuration is adopted, a part of the oil sent from the degassing pump 12 is circulated again to the inlet of the degassing pump 12, and the finer air bubbles remaining in the oil are also degassed again. It can be separated by the pump 12.

実施の形態３．
実施の形態３による回転電機の密封油供給装置１００を図３に示す。この実施の形態３は、前述した実施の形態２の空気側密封油系統を構成する脱気ポンプ１２の上流であって、空気側戻り配管１０の上流のループシールタンク４との間にトラップ２２と、気泡配管２３を追加して設けたものであり、他は実施の形態２と同様である。このような構成を採用しているので、トラップ２２によって比較的大きな気泡をトラップ２２内の気相部に集めて気泡配管２３によって外部に排出することができる。その結果、脱気ポンプ１２では比較的小さな気泡のみを除去するため、脱気効果を増大させることが可能となる。 Embodiment 3.
FIG. 3 shows the sealing oil supply device 100 of the rotary electric machine according to the third embodiment. The third embodiment is upstream of the degassing pump 12 constituting the air-side sealing oil system of the second embodiment described above, and is trapped between the trap 22 and the loop seal tank 4 upstream of the air-side return pipe 10. And, the bubble pipe 23 is additionally provided, and the other parts are the same as those in the second embodiment. Since such a configuration is adopted, relatively large bubbles can be collected in the gas phase portion in the trap 22 by the trap 22 and discharged to the outside by the bubble pipe 23. As a result, since the degassing pump 12 removes only relatively small bubbles, it is possible to increase the degassing effect.

本願は、様々な例示的な実施の形態及び実施例が記載されているが、１つ、または複数の実施の形態に記載された様々な特徴、態様、及び機能は特定の実施の形態の適用に限られるのではなく、単独で、または様々な組み合わせで実施の形態に適用可能である。
従って、例示されていない無数の変形例が、本願に開示される技術の範囲内において想定される。例えば、少なくとも１つの構成要素を変形する場合、追加する場合または省略する場合、さらには、少なくとも１つの構成要素を抽出し、他の実施の形態の構成要素と組み合わせる場合が含まれるものとする。 Although the present application describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are applications of a particular embodiment. It is not limited to, but can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not exemplified are envisioned within the scope of the techniques disclosed in the present application. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

１ 回転電機、２ 回転軸、３ 密封器、４ ループシールタンク、
５ 密封油供給管、６ 水素側排油管、７ 空気側排油管、８ 油浄化タンク、
９ 油面調整弁、１０ 空気側戻り配管、１１ 逆止弁、１２ 脱気ポンプ、
１３ 真空ポンプ、１４ 密封油ポンプ、１５ 安全弁、１６ 差圧調整弁、
１７ 分離弁、１８ 戻り管、１９ 空気排気管、２０ 排気管、２１ バイパス配管、２２ トラップ、２３ 気泡配管、１００ 回転電機の密封油供給装置。 1 rotary electric machine, 2 rotary shaft, 3 sealer, 4 loop seal tank,
5 Sealed oil supply pipe, 6 Hydrogen side oil drain pipe, 7 Air side oil drain pipe, 8 Oil purification tank,
9 Oil level adjustment valve, 10 Air side return piping, 11 Check valve, 12 Degassing pump,
13 Vacuum pump, 14 Sealed oil pump, 15 Safety valve, 16 Differential pressure control valve,
17 Separation valve, 18 Return pipe, 19 Air exhaust pipe, 20 Exhaust pipe, 21 Bypass pipe, 22 Trap, 23 Bubble pipe, 100 Rotating electric machine sealing oil supply device.

Claims (4)

回転電機の密封油供給装置であって、前記回転電機の軸封部に設けられた密封器の供給側には密封油供給管が設けられているとともに、排出側には空気側密封油系統と水素側密封油系統とが設けられており、前記密封油供給管を介して前記密封器に供給された密封油が前記密封器を通過後に、前記空気側密封油系統と前記水素側密封油系統とに分離して送出され、
前記空気側密封油系統は、前記密封器に接続して設けられた空気側排油管に繋がるループシールタンクと、前記ループシールタンクの排出側に設けられた空気側戻り配管と、前記密封油の気泡を除去する気泡除去部とを備え、
前記水素側密封油系統は、前記密封器に接続して設けられた水素側排油管に繋がる油浄化タンクと、前記油浄化タンクの排出側に設けられた戻り管とを備え、
前記空気側密封油系統内の前記気泡除去部は、前記空気側戻り配管に設けられた脱気ポンプと、前記脱気ポンプの後段に設けられた真空ポンプとによって構成される
回転電機の密封油供給装置。 It is a sealing oil supply device of a rotary electric machine, and a sealing oil supply pipe is provided on the supply side of the sealer provided in the shaft sealing portion of the rotary electric machine, and an air side sealing oil system is provided on the discharge side. A hydrogen-side sealing oil system is provided, and after the sealing oil supplied to the sealing device through the sealing oil supply pipe passes through the sealing device, the air-side sealing oil system and the hydrogen-side sealing oil system are provided. Separated from and sent,
The air-side sealing oil system includes a loop seal tank connected to the air-side oil drain pipe provided connected to the sealer, an air-side return pipe provided on the discharge side of the loop seal tank, and the sealing oil. Equipped with an air bubble removing part that removes air bubbles
The hydrogen-side sealed oil system includes an oil purification tank connected to the hydrogen-side oil discharge pipe provided by connecting to the sealer, and a return pipe provided on the discharge side of the oil purification tank.
The bubble removing portion in the air-side sealing oil system is composed of a degassing pump provided in the air-side return pipe and a vacuum pump provided in the subsequent stage of the degassing pump.
Sealing oil supply device for rotary electric machines. 前記空気側密封油系統と前記水素側密封油系統の密封油は、前記密封油供給管で合流し、前記密封油供給管に接続して設けられた密封油ポンプにより押し出されて、前記密封器に供給される請求項１に記載の回転電機の密封油供給装置。 The sealing oil of the air-side sealing oil system and the hydrogen-side sealing oil system is merged by the sealing oil supply pipe and extruded by a sealing oil pump provided connected to the sealing oil supply pipe, and the sealing device is used. The sealing oil supply device for a rotary electric machine according to claim 1 . 前記脱気ポンプと前記脱気ポンプの排出側に設けられた前記密封油供給管に対して、並列回路を形成するようにバイパス配管が設けられた請求項１または請求項２に記載の回転電機の密封油供給装置。 The rotary electric machine according to claim 1 or 2 , wherein a bypass pipe is provided so as to form a parallel circuit with respect to the degassing pump and the sealing oil supply pipe provided on the discharge side of the degassing pump. Sealing oil supply device. 前記空気側戻り配管の上流であって、前記ループシールタンクとの間にトラップと気泡配管とが設けられた請求項１から請求項３のいずれか１項に記載の回転電機の密封油供給装置。 The sealing oil supply device for a rotary electric machine according to any one of claims 1 to 3 , wherein a trap and a bubble pipe are provided upstream of the air-side return pipe and between the loop seal tank and the loop seal tank. ..
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JP2004007876A (en) 2002-05-31 2004-01-08 Mitsubishi Electric Corp Sealed oil feeder of electric motor
WO2017154084A1 (en) 2016-03-08 2017-09-14 三菱電機株式会社 Rotating electric machine with shaft seal device

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JPS6134857Y2 (en) * 1980-06-03 1986-10-09

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Publication number Priority date Publication date Assignee Title
JP2004007876A (en) 2002-05-31 2004-01-08 Mitsubishi Electric Corp Sealed oil feeder of electric motor
WO2017154084A1 (en) 2016-03-08 2017-09-14 三菱電機株式会社 Rotating electric machine with shaft seal device

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