JP2006345697A - Shaft sealing device of rotary electric machine - Google Patents

Shaft sealing device of rotary electric machine Download PDF

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Publication number
JP2006345697A
JP2006345697A JP2006243605A JP2006243605A JP2006345697A JP 2006345697 A JP2006345697 A JP 2006345697A JP 2006243605 A JP2006243605 A JP 2006243605A JP 2006243605 A JP2006243605 A JP 2006243605A JP 2006345697 A JP2006345697 A JP 2006345697A
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Japan
Prior art keywords
seal ring
machine
electric machine
oil supply
rotary electric
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Pending
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JP2006243605A
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Japanese (ja)
Inventor
Takashi Murakami
崇 村上
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2006243605A priority Critical patent/JP2006345697A/en
Publication of JP2006345697A publication Critical patent/JP2006345697A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To enhance workability of assembling/disassembling work when the shaft sealing device of a rotary electric machine is maintained by reducing the weight per component of seal ring. <P>SOLUTION: A seal ring 2 for forming an oil film between the seal ring 2 and the rotating shaft 1 of a rotary electric machine is divided, at the part of an outer oil supply groove 2a, into an outer seal ring 2i and an inner seal ring 2j. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、回転電機の軸封装置に関するもので、より詳細にいえば、回転体が固定部を貫通する部分で機内冷却用の水素ガス漏洩を防止するシールリング部の構成に関するものである。   The present invention relates to a shaft seal device for a rotating electrical machine, and more specifically, to a configuration of a seal ring portion that prevents leakage of hydrogen gas for cooling in a machine at a portion where a rotating body passes through a fixed portion.

図３は従来の回転電機の構造を示す断面図であり、図４は図３の一部拡大図である。図において、回転軸１１の径方向の周りには、この回転軸１１との間に回転電機内部の水素ガスの漏洩を防止するために油膜を形成するシールリング１２が設けられており、このシールリング１２の軸方向の周囲にはグランドシール１３が設けられている。   FIG. 3 is a sectional view showing the structure of a conventional rotating electric machine, and FIG. 4 is a partially enlarged view of FIG. In the figure, a seal ring 12 that forms an oil film is provided around the radial direction of the rotary shaft 11 to prevent leakage of hydrogen gas inside the rotary electric machine between the rotary shaft 11 and the seal. A ground seal 13 is provided around the ring 12 in the axial direction.

そして、上記シールリング１２には、２つの環状の給油溝１２ａ，１２ｂが設けられており、その一方の給油溝１２ａは、密封機能を果たす油を給油するための機外側給油溝であり、もう一方の給油溝１２ｂは機内側給油溝である。また、上記シールリング１２の内周面は、機外側軸受面１２ｃと機内側軸受面１２ｄとからなっている。なお、これら軸受面の材質は軸受メタルから成っている。   The seal ring 12 is provided with two annular oil supply grooves 12a and 12b. One of the oil supply grooves 12a is an outboard oil supply groove for supplying oil having a sealing function. One oil supply groove 12b is a machine-side oil supply groove. The inner circumferential surface of the seal ring 12 is composed of an outboard bearing surface 12c and an inboard bearing surface 12d. These bearing surfaces are made of a bearing metal.

そして、一方の機外側密封部では密封油１４が用いられると共に、他方の機内側密封部では密封油１５が用いられ、機内側に流れる密封油１５は下部に配設した排油溝１６から排出される。
なお、図中の矢印はそれぞれ油の流れの方向を示している。 The sealing oil 14 is used in one of the machine outside sealing parts, and the sealing oil 15 is used in the other machine inside sealing part, and the sealing oil 15 flowing inside the machine is discharged from a drain oil groove 16 disposed in the lower part. Is done.
In addition, the arrow in a figure has shown the direction of the flow of oil, respectively.

次にこの回転電機の軸封装置の動作について説明する。密封油１４，１５は２つの環状の機外側給油溝１２ａ及び機内側給油溝１２ｂにそれぞれ供給され、シールリング１２と回転軸１１の隙間を通り、回転軸１１に沿って流れる。   Next, the operation of the shaft seal device of the rotating electric machine will be described. The sealing oils 14 and 15 are respectively supplied to two annular machine-side oil supply grooves 12 a and machine-side oil supply grooves 12 b, flow along the rotation shaft 11 through the gap between the seal ring 12 and the rotation shaft 11.

密封油圧が機内ガス圧より高圧である限り、機内側給油溝１２ｂを流れる密封油はシールリング１２から機内側に向かって流れ、水素の漏洩を防ぐ。また、密封油が機外空気圧より高圧である限り、機外側給油溝１２ａを流れる密封油はシールリング１２から機外側に向かって流れ、空気の機内への侵入を防ぐ。   As long as the sealing oil pressure is higher than the in-machine gas pressure, the sealing oil flowing in the in-machine oil supply groove 12b flows from the seal ring 12 toward the inside of the machine to prevent hydrogen leakage. In addition, as long as the sealing oil is higher than the air pressure outside the machine, the sealing oil flowing through the machine-side oil supply groove 12a flows from the seal ring 12 toward the machine outside to prevent air from entering the machine.

上記のように構成された回転電機の軸封装置の分解、組立時においては、回転電機の軸封装置の保守時に分解あるいは組立をする場合、シールリング１２の取り出し及び挿入を行なうが、この場合、揚重装置を使用せずに作業を行なう（特許文献１参照）。   When disassembling or assembling the shaft seal device of the rotating electrical machine constructed as described above, the seal ring 12 is taken out and inserted when disassembling or assembling during maintenance of the shaft seal device of the rotating electrical machine. The work is performed without using a lifting device (see Patent Document 1).

特開平６−１０６１５号公報JP-A-6-10615

従来の回転電機の軸封装置は以上のように構成されているので、回転電機の軸封装置の保守時における分解、組立時にシールリングの重量が重い場合には作業性が悪くなる。   Since the conventional shaft seal device of a rotating electrical machine is configured as described above, workability is degraded when the weight of the seal ring is heavy during disassembly and assembly of the shaft seal device of the rotating electrical machine.

この発明は上記のような課題を解決するためになされたものであり、従来の回転電機の軸封装置と異なり、シールリングを機外側給油溝の部分で分割することにより、シールリング１部品あたりの重量を軽減し、回転電機の軸封装置の保守時における分解、組立時の作業性の向上を図ることを目的とする。   The present invention has been made to solve the above-described problems. Unlike a conventional shaft seal device of a rotating electric machine, the present invention is designed to divide the seal ring at the part of the machine-side oil supply groove so The purpose is to improve the workability at the time of disassembly and assembly during maintenance of the shaft seal device of the rotating electrical machine.

この発明の請求項１に係る回転電機の軸封装置は、シールリングを給油溝を境にして分割したものである。   According to a first aspect of the present invention, there is provided a shaft seal device for a rotating electrical machine in which a seal ring is divided with an oil supply groove as a boundary.

この発明の請求項１に係る回転電機の軸封装置によれば、シールリングを給油溝を境にして分割したので、シールリング１部品あたりの重量が軽減され、回転電機の軸封装置の保守時における分解、組立等の作業性が向上する。   According to the shaft seal device for a rotating electrical machine according to claim 1 of the present invention, since the seal ring is divided with the oil supply groove as a boundary, the weight per part of the seal ring is reduced, and the shaft seal device for the rotating electrical machine is maintained. Workability such as disassembly and assembly at the time is improved.

実施の形態１．
以下、この発明の実施の形態を図に基づいて説明する。図１はこの発明の前提技術となる回転電機のシールリング部を示す断面図であり、図において、回転軸１の径方向の周りには、この回転軸１との間に回転電機内部の水素ガスの漏洩を防止するために油膜を形成するシールリング２が設けられており、このシールリング２の軸方向の周囲にはグランドシール３が設けられている。 Embodiment 1 FIG.
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a seal ring portion of a rotating electrical machine as a prerequisite technology of the present invention. In the figure, there is hydrogen in the rotating electrical machine around the rotating shaft 1 around the radial direction of the rotating shaft 1. A seal ring 2 for forming an oil film is provided to prevent gas leakage, and a gland seal 3 is provided around the seal ring 2 in the axial direction.

そして上記シールリング２には２つの環状の給油溝２ａ，２ｂが設けられており、一方の給油溝２ａは、密封機能を果たす油を給油する機外側給油溝であり、もう一方の給油溝２ｂは機内側給油溝である。ここで、上記シールリング２の内周面は、機外側軸受面２ｃと機内側軸受面２ｄとからなっている。   The seal ring 2 is provided with two annular oil supply grooves 2a and 2b. One oil supply groove 2a is a machine-side oil supply groove for supplying oil having a sealing function, and the other oil supply groove 2b. Is an in-machine oiling groove. Here, the inner peripheral surface of the seal ring 2 is composed of an outboard bearing surface 2c and an inboard bearing surface 2d.

なお、機外側密封部では密封油４が用いられると共に、機内側密封部では密封油５が用いられ、そしてこの密封油５は、上記従来装置と同様に、下部の排油溝（図示省略）から排出されるようになされている。
図中の矢印はそれぞれ油の流れ方向を示している。 In addition, the sealing oil 4 is used in the outside sealing part, and the sealing oil 5 is used in the inside sealing part. The sealing oil 5 is a lower oil drain groove (not shown) as in the conventional apparatus. It is made to be discharged from.
Each arrow in the figure indicates the direction of oil flow.

図２はこの発明の実施の形態１による回転電機のシールリング部を示す断面図であり、図において、シールリング２は機外側給油溝２ａの部分で機外側シールリング２ｉと機内側シールリング２ｊとに分割されている。   FIG. 2 is a cross-sectional view showing a seal ring portion of a rotary electric machine according to Embodiment 1 of the present invention. In the figure, the seal ring 2 is an outer side oil ring 2a and an outer side seal ring 2i and an inner side seal ring 2j. It is divided into and.

次に動作について説明する。この発明の実施の形態１によるシールリング２は、機外側給油溝２ａの部分で機外側シールリング２ｉと機内側シールリング２ｊとに分割されているので、シールリング１部品あたりの重量が軽減され、回転電機の軸封装置の保守時における分解、組立等の作業性が向上する。   Next, the operation will be described. Since the seal ring 2 according to the first embodiment of the present invention is divided into the outer seal ring 2i and the inner seal ring 2j at the outer oil supply groove 2a, the weight per seal ring component is reduced. Thus, workability such as disassembly and assembly during maintenance of the shaft seal device of the rotating electrical machine is improved.

この発明の前提技術となる回転電機の軸封装置を示す断面図である。It is sectional drawing which shows the shaft seal apparatus of the rotary electric machine used as the premise technique of this invention. この発明の実施の形態１による回転電機の軸封装置を示す断面図である。It is sectional drawing which shows the shaft seal apparatus of the rotary electric machine by Embodiment 1 of this invention. 従来の回転電機の軸封装置を示す断面図である。It is sectional drawing which shows the shaft seal apparatus of the conventional rotary electric machine. 図３の一部拡大断面図である。It is a partially expanded sectional view of FIG.

符号の説明Explanation of symbols

１ 回転軸、２ シールリング、２ａ 機外側給油溝、２ｂ 機内側給油溝、
２ｉ 機外側シールリング、２ｊ 機内側シールリング。 1 Rotating shaft, 2 Seal ring, 2a Machine oil supply groove, 2b Machine oil supply groove,
2i Machine outside seal ring, 2j Machine inside seal ring.

Claims (1)

回転軸との間に油膜を形成するシールリングを設け、当該シールリングに給油溝を設けた回転電機の軸封装置において、上記シールリングを上記給油溝を境にして分割したことを特徴とする回転電機の軸封装置。 In a shaft seal device of a rotating electrical machine in which a seal ring that forms an oil film is provided between the rotary shaft and an oil supply groove is provided in the seal ring, the seal ring is divided at the oil supply groove as a boundary. A shaft seal device for rotating electrical machines.
JP2006243605A 2006-09-08 2006-09-08 Shaft sealing device of rotary electric machine Pending JP2006345697A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006243605A JP2006345697A (en) 2006-09-08 2006-09-08 Shaft sealing device of rotary electric machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006243605A JP2006345697A (en) 2006-09-08 2006-09-08 Shaft sealing device of rotary electric machine

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP13837897A Division JPH10325304A (en) 1997-05-28 1997-05-28 Shaft seal device for electric rotating machine

Publications (1)

Publication Number Publication Date
JP2006345697A true JP2006345697A (en) 2006-12-21

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ID=37642198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006243605A Pending JP2006345697A (en) 2006-09-08 2006-09-08 Shaft sealing device of rotary electric machine

Country Status (1)

Country Link
JP (1) JP2006345697A (en)

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