JPH0352533A - Protector for transportation of bearing for rotary electric machine - Google Patents

Abstract

PURPOSE:To realize the reduction of vibration upon rotating and the protection of transportation of a bearing by a method wherein a disc is fixed to the root of the end of a rotary shaft, penetrating through the cover of a rotary electric machine, the disc is provided with a balancing means and axial female threaded holes while bolts, pushing the cover, are provided detachably. CONSTITUTION:A disc 15, provided with a groove capable of attaching a balancing weight 3 as a balancing means, is fixed to the root of the end 2 of a rotary shaft, supported by bearings not shown in a diagram and penetrating through a cover 1, through force fitting or the like while a retainer ring 9 is provided if necessary. The disc 15 is provided further with a plurality of female threaded holes 10a and bolts 10 are screwed thereinto. When the bolts 10 are tightened, the tip ends of the bolts push the cover 1 whereby the protecting effect of the transportation of the bearings may be effected. When the bolts are loosened or removed, a rotary machine may be operated. For your reference, when a coupling member 20, such as a coupling or the like for connecting the shaft to the machine, is abutted against the heads of the bolts 10, the abutting part 2a of the coupling member 20 to the shaft end 2 may be shifted rightward in the diagram.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、比較的に使用回転数の大きい回転電機の軸
受の輸送保護装置に関する． 〔従来の技術〕 ころがり軸受を用いた回転電機を輸送する時には、車両
等の輸送手段から衝撃的な振動を受けて、その加速度は
数ｇから１０ｇ近くになる（ｇは重力の加速度）。その
衝撃加速度は軸受の転勤体と転走面との接点（ころ軸受
では接線）に働いて大きなたたくような変動応力を生じ
、輸送中は回転軸が停止しているのでいわゆる微動摩耗
（フレフティングコロージョンともいう）を起こす。微
動摩耗は顕微鏡的な微細なものであっても、その回転電
機を運転使用すると急速に軸受の破壊に連がる．軸受が
スラスト隙間を持たない例えば予圧力を与えたものでも
、大形機では微動摩耗を起こし、すべり軸受でも事情は
変らず同様な現象をおこす。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a transportation protection device for a bearing of a rotating electric machine that is used at a relatively high rotational speed. [Prior Art] When a rotating electric machine using a rolling bearing is transported, it is subjected to impactful vibrations from a transportation means such as a vehicle, and its acceleration ranges from several g to nearly 10 g (g is the acceleration of gravity). The impact acceleration acts on the contact point (tangential line for roller bearings) between the rolling element and the rolling surface of the bearing, producing a large knock-like fluctuating stress. Because the rotating shaft is stopped during transportation, so-called micro-wear (flefting) occurs. (also called corrosion). Even if microscopic wear is microscopic, it can quickly lead to bearing failure when the rotating electric machine is operated. Even if the bearing does not have a thrust clearance, for example if a preload force is applied, fine movement wear will occur in large machines, and the same phenomenon will occur even in sliding bearings.

そのために輸送時のみ装着する輸送保護装置がよく使用
される． 一方、回転子の釣り合いに関しては、回転子付の回転軸
を動均り合い試験器に載せて回転子の両端面又は特に付
加した円板で動均り合いをとり外被に組込むようにする
。しかし高速回転するもの、立軸のもの、大形機では、
更に均り合いをよくするために外被を貫通する軸端に均
り合いのための円板を設け、均り合い重りをつけられる
ようにする．これは据付現地での最終的な釣り合いとり
（フィールドバランスともいう）にも使用され、回転電
機は良好な均り合いのもとに少い振動で運転される． 第２図は従来例の断面図であって、外被の外に均り合い
円板を設け、輸送保護装置を備えたものを示す。For this reason, transport protection devices that are worn only during transport are often used. On the other hand, regarding the balance of the rotor, the rotating shaft with the rotor is placed on a dynamic balance tester, and the dynamic balance is determined using both end faces of the rotor or a specially added disk, and the rotor is assembled into the outer jacket. . However, for high-speed rotating machines, vertical shaft machines, and large machines,
Furthermore, in order to improve the balance, a balance disk is provided at the end of the shaft that passes through the outer cover, so that a balance weight can be attached. This is also used for final balancing at the installation site (also called field balance), and rotating electrical machines are operated with good balance and less vibration. FIG. 2 is a sectional view of a conventional example, in which a balancing disk is provided outside the jacket and a transport protection device is provided.

図において、図示しない軸受で支持され、外被１を貫通
する回転軸の軸端部２には、均り合い重り３を取付可能
なバランスリング４を備えた円板５が圧入等で固着され
る。In the figure, a disk 5 equipped with a balance ring 4 to which a counterbalance weight 3 can be attached is fixed by press-fitting or the like to the shaft end 2 of a rotating shaft that is supported by a bearing (not shown) and passes through the outer cover 1. Ru.

輸送保護装置はスタッド６ａを溶接した円板６、その中
心の穴に通すボルト７及びこのボルトと円板６との間の
ワッシャ８とからなる。ボルト７を軸端部２のねじ穴に
締め込むとスタフド６ａの先端が外被１を押すので、回
転軸は外被に対し右方向に引張られ、図示しない軸受が
スラスト方向に固定される。例えば玉軸受では玉が内外
輪の転走面に適宜な応力で接触し、輸送の衝撃加速度に
よる変動応力をやわらげ、微動摩耗を防ぐ．〔発明が解
決しようとする課題〕 前記の従来の技術において、一般に回転電機は、電機製
造業者から機械製造業者へ輸送され、ここで機械に結合
されてから使用者へ再び輸送される．ところが前記従来
例において、軸受の輸送保護装置は電機製造業者から機
械製造業者までは有効であるが、機械に結合される時に
取り外されてしまうので、機械製造業者から使用者まで
の輸送では軸受の輸送保護が無くなり、この輸送で軸受
が損傷してしまうという問題がある． この発明の目的は、均り合いとりのための円板を活用し
て、機械に結合されてからも輸送保護装置を使用できる
ような回転電機の軸受の輸送保護装置を提供することに
ある。The transport protection device consists of a disc 6 to which a stud 6a is welded, a bolt 7 passing through a hole in the center of the disc, and a washer 8 between this bolt and the disc 6. When the bolt 7 is tightened into the threaded hole in the shaft end 2, the tip of the stuffed shaft 6a pushes the outer sheath 1, so that the rotating shaft is pulled to the right with respect to the outer sheath, and a bearing (not shown) is fixed in the thrust direction. For example, in ball bearings, the balls contact the raceway surfaces of the inner and outer rings with appropriate stress, softening the fluctuating stress caused by impact acceleration during transportation and preventing micro-vibration wear. [Problems to be Solved by the Invention] In the above-mentioned conventional technology, the rotating electrical machine is generally transported from the electrical equipment manufacturer to the machine manufacturer, where it is connected to the machine and then transported again to the user. However, in the conventional example, although the bearing transport protection device is effective from the electrical equipment manufacturer to the machine manufacturer, it is removed when it is connected to the machine, so the bearing is not transported from the machine manufacturer to the user. There is a problem in that there is no transportation protection and the bearings can be damaged during this transportation. SUMMARY OF THE INVENTION An object of the present invention is to provide a transportation protection device for a bearing of a rotating electrical machine that utilizes a balancing disk and can be used even after being connected to the machine.

〔課題を解決するための手段〕[Means to solve the problem]

この発明の回転電機の軸受の輸送保護装置は、回転電機
の外被を貫通する回転軸の軸端部の根本に円板を固着し
、この円板にバランス取り手段と軸方向のめねじ穴とを
設け、このめねじ穴に輸送時に締め込んで前記外被を押
圧するボルトを着脱自在に設けるものである。The transportation protection device for a bearing of a rotating electric machine of the present invention has a disk fixed to the base of the shaft end of a rotating shaft that penetrates the outer cover of the rotating electric machine, and a balancing means and a female threaded hole in the axial direction. and a bolt is detachably provided in this female threaded hole to press the outer cover by tightening it during transportation.

〔作用〕[Effect]

バランス取り手段（溝と均り合い重り等）を備えた円板
は軸端部の根本に固着されているので、取り外しが困難
であり、かつそのまま機械の結合ができる。したがって
機械結合後に円板のめねじ穴にボルトを締め込んで外被
に押圧すれば、使用者への輸送中にも軸受の輸送保護が
実施でき、輸送の衝撃加速度による軸受の微動摩耗等に
よる損傷を防ぐ。回転電機の運転にはボルトを緩めるか
取り外すことができる。Since the disc with balancing means (grooves, counterweights, etc.) is fixed to the base of the shaft end, it is difficult to remove and can be connected to the machine as is. Therefore, by tightening the bolt into the female threaded hole of the disc and pressing it against the outer cover after mechanical connection, the bearing can be protected during transportation to the user, and the bearing can be protected from micro-vibration wear due to impact acceleration during transportation. Prevent damage. The bolts can be loosened or removed to operate the rotating electrical machine.

〔実施例〕〔Example〕

第１図は実施例の断面図であり、図示しない軸受で支持
され、外被１を貫通する回転軸の軸端部２の根本には、
バランス取り手段として均り合い重り３を取付可能な溝
を備えた円板１５が圧入等で固着され、必要により止め
輪９が設けられる。FIG. 1 is a sectional view of the embodiment. At the base of the shaft end 2 of the rotating shaft that is supported by a bearing (not shown) and passes through the outer cover 1,
A disk 15 having a groove into which a counterbalancing weight 3 can be attached as a balancing means is fixed by press-fitting or the like, and a retaining ring 9 is provided if necessary.

円板１５には更に複数のめねじ穴１０ａを設けてボルト
１０がねじ込まれる．このボルト１０を締め込めば先端
が外被１を押圧して軸受の輸送保護作用をする。緩める
か取り外せば回転機を運転できる。The disc 15 is further provided with a plurality of female threaded holes 10a into which bolts 10 are screwed. When this bolt 10 is tightened, the tip presses against the outer cover 1 to protect the bearing during transportation. If you loosen or remove it, you can operate the rotating machine.

なお、機械との結合のカンプリング等の結合部材２０が
ボルト１０の頭に当るような場合は、結合部材２０の軸
端部２への付き当部２ａを図示で右の方へ移せばよい。In addition, if the coupling member 20 such as a camp ring for coupling with a machine comes into contact with the head of the bolt 10, the contact part 2a of the coupling member 20 to the shaft end 2 may be moved to the right in the illustration. .

〔発明の効果〕〔Effect of the invention〕

この発明の回転電機の軸受の輸送保護装置は、回転電機
の外被を貫通する回転軸の軸端部の根本に円板を固着し
、この円板にバランス取り手段と軸方向のめねじ穴とを
設け、このめねじ穴に輸送時に締め込んで前記外被を押
圧するボルトを着脱自在に設けるようにしたので、 外被の外に設ける均り合いとりのための円板で重力釣り
合いが高精度に保たれて、高速回転、立軸等の回転電機
の振動が低下するとともに、前記円板を軸受の輸送保護
に兼用できるという効果があり、特に機械製造業者から
使用者への輸送についても、軸受の輸送保護ができるよ
うになるという効果がある．The transportation protection device for a bearing of a rotating electric machine of the present invention has a disk fixed to the base of the shaft end of a rotating shaft that penetrates the outer cover of the rotating electric machine, and a balancing means and a female threaded hole in the axial direction. Since a bolt is removably installed in this female threaded hole to press the outer sheath by tightening it during transportation, gravity is balanced by a balancing disk provided outside the outer sheath. This has the effect of maintaining high precision and reducing vibrations in rotating electric machines such as high-speed rotation and vertical shafts, and the disc can also be used to protect bearings during transportation, especially when transporting them from machine manufacturers to users. This has the effect of protecting the bearing during transportation.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は実施例の断面図、第２図は従来例の断面図であ
る． １・・・外被、２・・・軸端部、３・・・均り合い重り
、５，６， １ ５・・・円板、 ７， １ Ｏ・・・ボルト。 ２Ｑ 第 ｌ 図 第 ２ 図Fig. 1 is a sectional view of the embodiment, and Fig. 2 is a sectional view of the conventional example. DESCRIPTION OF SYMBOLS 1... Outer cover, 2... Shaft end, 3... Balance weight, 5, 6, 1 5... Disc, 7, 1 O... Bolt. 2Q Figure l Figure 2

Claims (1)

【特許請求の範囲】[Claims] １）回転電機の外被を貫通する回転軸の軸端部の根本に
円板を固着し、この円板にバランス取り手段と軸方向の
めねじ穴とを設け、このめねじ穴に輸送時に締め込んで
前記外被を押圧するボルトを着脱自在に設けることを特
徴とする回転電機の軸受の輸送保護装置。1) A disk is fixed to the base of the shaft end of the rotating shaft that penetrates the outer sheath of the rotating electrical machine, and a balancing means and an axial female threaded hole are provided on this disk, and the female threaded hole is inserted into the threaded hole during transportation. 1. A transportation protection device for a bearing of a rotating electrical machine, characterized in that a bolt that is tightened to press the outer cover is detachably provided.