JPH02130288A - Bearing pressing device for screw compressor - Google Patents
Bearing pressing device for screw compressorInfo
- Publication number
- JPH02130288A JPH02130288A JP63283631A JP28363188A JPH02130288A JP H02130288 A JPH02130288 A JP H02130288A JP 63283631 A JP63283631 A JP 63283631A JP 28363188 A JP28363188 A JP 28363188A JP H02130288 A JPH02130288 A JP H02130288A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- screw compressor
- outer ring
- members
- presses
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/067—Fixing them in a housing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はスクリュー圧縮機における玉軸受の外輪を固定
する軸受押え装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bearing holding device for fixing the outer ring of a ball bearing in a screw compressor.
従来の装置は、特開昭６８−９０６８９号公報に記載の
ように、玉軸受の外輪を固定するために軸受押えを、バ
ネで押す方法がとられていた。この方法は、ある荷重で
外輪を押すことができ、スラスト荷重が正方向に働いて
いる場合は有効である。しかし反スラスト方向の荷重に
ついては、軸受全体が、反スラスト方向に動いてしまい
、スクリューロータの端面が接触する等の欠点を有する
〔発明が解決しようとする課題〕
上記従来技術はスクリューロータの圧縮反力が正方向に
かかった場合については、有効であるが、逆方向にかか
った場合（例えば、逆回転、異物のかみ込み他）につい
ては、軸受全体が動いてしまい、スクリューロータの端
面が、接触する等について配慮がされておらず、正方向
にかかる荷重に対する玉軸受は、２シモ
、軸受外輪を、軽く均等に押えたい、反面、逆方向にか
かる荷重に対しては、前記に示す問題があった。In a conventional device, as described in Japanese Patent Application Laid-Open No. 68-90689, a method was used in which a bearing holder was pressed by a spring in order to fix the outer ring of a ball bearing. This method is effective if the outer ring can be pushed with a certain load and the thrust load is acting in the positive direction. However, with respect to the load in the anti-thrust direction, the entire bearing moves in the anti-thrust direction, and the end face of the screw rotor comes into contact with each other.[Problem to be solved by the invention] This is effective if the reaction force is applied in the positive direction, but if it is applied in the opposite direction (for example, due to reverse rotation, foreign matter being caught, etc.), the entire bearing will move and the end face of the screw rotor will be damaged. For ball bearings that do not take into account contact, etc., and for loads that are applied in the forward direction, we want to press the bearing outer ring lightly and evenly, but on the other hand, for loads that are applied in the opposite direction, the There was a problem.
本発明の目的は、スクリューロータのスラスト方向の荷
重が、正・逆方向にかかつても、玉軸受を固定しかつ、
玉軸受外輪を均等に押すことにより、軸受寿命等を確立
することにある。The object of the present invention is to fix the ball bearing even if the load in the thrust direction of the screw rotor is in the forward or reverse direction, and
The purpose is to extend the life of the bearing by pushing the outer ring of the ball bearing evenly.
本発明の他の目的は、玉軸受外輪を、均等に軽荷重で押
し、かつ逆スラスト力が玉軸受にかかりても、耐えられ
る玉軸受外輪押え装置を得ることにある。Another object of the present invention is to obtain a ball bearing outer ring holding device that can press the ball bearing outer ring evenly with a light load and can withstand even when a reverse thrust force is applied to the ball bearing.
上記目的を達成するために、本発明は、玉軸受外輪を押
さえる部材を２分割したものである。In order to achieve the above object, the present invention divides a member for holding down a ball bearing outer ring into two parts.
また、２分割した部材の玉軸受外輪を直接押す部材をケ
ーシング（玉軸受が入る部分）内径と部材外径とのスキ
マな小さくしたものである。In addition, the member that directly pushes the ball bearing outer ring of the two-part member is made small enough to leave a gap between the inner diameter of the casing (the part into which the ball bearing is inserted) and the outer diameter of the member.
さらに２分割した部材のも９一方の部材に小径のボルト
を複数個設け、このボルトの締付トルクを管理すること
により、玉軸受外輪に規定荷重をあたえる構造としたも
のである。Further, one of the two divided members is provided with a plurality of small diameter bolts, and by controlling the tightening torque of the bolts, a specified load is applied to the ball bearing outer ring.
玉軸受外輪を固定する丸めの部材を２分割する構造を基
本構造とする。一方の玉軸受外輪に直接接する部材は、
軸受面と反軸受面の２面で接触する。もラ一方の部材に
は、小径のボルトが、４ＩＬ数個設けられ、このボルト
の締付による力は各接触面を介して、玉軸受外輪につた
わり、玉軸受を固定する。上記ボルトの締付が、均等に
なるようにボルト配置を均等とした。ボルト締付が、か
たよった場合、２つの接触面と、一方の部材の外径スキ
マな小さくおさえたことにより、かたじめが、緩和され
、玉軸外輪は、均等に押さえられた。The basic structure is that the round member that fixes the ball bearing outer ring is divided into two. The members that are in direct contact with the outer ring of one ball bearing are:
It makes contact on two sides: the bearing surface and the anti-bearing surface. Several small-diameter bolts (4IL) are provided on one of the members, and the force caused by tightening the bolts is transmitted to the ball bearing outer ring through each contact surface, thereby fixing the ball bearing. The bolts were arranged evenly so that the bolts were evenly tightened. If the bolt was tightened unbalanced, the stiffness was alleviated by keeping the gap between the two contact surfaces and the outer diameter of one member small, and the ball shaft outer ring was held evenly.
２分割した部材の間に球を入れ、球を介して、玉軸受外
輪を押える方式においては、前記ボルト締付が、かたよ
った場合、球によって一方の部材に加わる力が、均等に
なり、玉軸受外輪は均等に押さえられる。又別の方式と
じて、２分割した部材の間にバネを入れ、バネ力によシ
、一方の部材に均等な力を加える方式とすれば、玉軸受
外輪は均等に押えられる。In the method of inserting a ball between two divided members and pressing the ball bearing outer ring through the ball, if the bolt is tightened unevenly, the force applied by the ball to one member becomes equal, and the ball The bearing outer ring is evenly pressed. Another method is to insert a spring between the two divided members and use the spring force to apply equal force to one member, so that the outer ring of the ball bearing can be held down evenly.
以下、本発明の一実施例を第１図により説明する。吸入
ガスはケーシング１内に収納された一対のオスロータ２
とメスロータ８の噛み合いにより圧縮される。駆動用モ
ータ４はモータケーシング５に収納されオスロータ軸に
オーバ／Ｓフグする構造である。An embodiment of the present invention will be described below with reference to FIG. Intake gas is supplied by a pair of male rotors 2 housed in a casing 1.
It is compressed by the meshing of the female rotor 8 and the female rotor 8. The drive motor 4 is housed in a motor casing 5 and has a structure in which the drive motor 4 is attached to the male rotor shaft.
通常圧縮反力により、オスロータとメスロータにはスラ
スト荷重とラジアル荷重が角生ずる。この荷重のラジア
ル荷重をコロジクウケ６−７および本図の構造では、ス
ラスト荷重を同一タマジクウケ８１１９で受ける。タマ
ジクウケ内輪はオスロータとメスロータ軸にナラ）１０
・１１で固定する。一方タマジクウケ外輪は部材１２・
１３を介して、部材１４・１５に設けた、ポル）１６で
ケーシング１に固定する。ここでケーシングのタマジク
ウケ部内径と部材１２−１８部内径は同一内径寸法とす
るこれらの部分をカバー１７で密封して、スクリュー圧
縮機を構成する。本実施例によれば、ボルト１６の締付
トルクを規定すれば、部材１４・１５とケーシングｌに
はすきまがあくよう設定すれば部材１４・１５が部材１
２・１８を押し、タマジクウケ８・９の外輪を一定荷重
で固定する。ボルト１６は第２図に示すごとく複数個均
等に設けられている。ボルト１６締付の際、かたじめが
発生しても、部材１２・１８の両漏面にすべりが生じ、
締付力は均等になる０部材１２・１８の外径とケーシン
グ１の部材１２−１８挿入部内径は、直径すきまでマイ
ナス８０μｍ〜プラス６０μｍに設定すれば、かたじめ
による力は全てのボルト１６が規定トルクに達した時点
で、均等に作用する。これらにより、タマジクウケ８・
９の外輪は規定荷重が、均等にかかり、軸受が整列し、
軸受寿命がのびる。又軸受表面の早期剥離・フレッティ
ング他の防止となり九、又通常とは逆方向へ荷重が働い
た場合でも、部材１２・１３、部材１４・１５はボルト
１６により固定され、剛体となっているので、タマジク
ウケ８・９の第１図中の右方向の移動が発生することは
ない、これらにより、オスロータ２、メスロータ８の歯
趨面とケーシングｌの接触防止が図れた。Normally, due to compression reaction force, a thrust load and a radial load are generated on the male and female rotors. In the structure shown in this figure, the radial load of this load is received by the radial load 6-7, and the same tamaji uke 8119 receives the thrust load. Tamajikuke inner ring is oak on male rotor and female rotor shaft) 10
・Fix at 11. On the other hand, the Tamajikuke outer ring is member 12.
13, and fixed to the casing 1 with pins 16 provided on the members 14 and 15. Here, the inner diameter of the casing part and the inner diameter of the members 12-18 are the same, and these parts are sealed with a cover 17 to constitute a screw compressor. According to this embodiment, if the tightening torque of the bolt 16 is specified, and the members 14 and 15 are set so that there is a clearance between them and the casing l, the members 14 and 15 will be
Press 2 and 18 to fix the outer rings of Tamajikuke 8 and 9 with a constant load. As shown in FIG. 2, a plurality of bolts 16 are provided evenly. Even if stiffness occurs when bolt 16 is tightened, slippage will occur on both leakage surfaces of members 12 and 18.
The tightening force will be equal.If the outer diameter of members 12 and 18 and the inner diameter of the insertion part of members 12-18 of casing 1 are set to a diameter of -80 μm to +60 μm, all of the force due to tightening will be equalized. When the bolts 16 reach the specified torque, they act evenly. With these, Tamajikuke 8.
The specified load is applied evenly to the outer ring 9, and the bearings are aligned.
Extends bearing life. It also prevents early peeling and fretting on the bearing surface. Also, even if a load is applied in the opposite direction to normal, members 12 and 13 and members 14 and 15 are fixed by bolts 16 and are rigid bodies. Therefore, the rightward movement of the rotors 8 and 9 in FIG. 1 does not occur.Thus, it is possible to prevent the tooth flanks of the male rotor 2 and female rotor 8 from coming into contact with the casing l.
他の実施例として、第８図に示す０本図の部材ＩＺａ
Ｉ １２ｂ ｌ １２．ｃはいずれも、ボルト１６によ
る締付力がタマジグクケ外輪へ均等に作用するように設
は九０部材１４との接触はいずれも線状となる構造であ
る。As another example, the member IZa shown in FIG.
I 12b l 12. Both bolts 16 and 14 have a structure in which the contact with the 90 member 14 is linear so that the tightening force of the bolt 16 acts equally on the outer ring of the bolt 14.
本構造はメスロータ側にも同一構造とすることが可能で
ある。This structure can also be applied to the female rotor side.
他の実施例として第４図に示す０本図の部材１８は、第
１図で示す０部材１４・１５を一体としたものである。As another embodiment, a zero-diameter member 18 shown in FIG. 4 is made by integrating the zero-diameter members 14 and 15 shown in FIG. 1.
この一体化と、部材１２・１８との組合せにより、より
タマジクウケ８・９外輪への力が均等化された。Through this integration and the combination of members 12 and 18, the force applied to the outer rings of Tamajikuke 8 and 9 is more evenly distributed.
他の実施例として第５図に示す０本図の部材１９と部材
２０の間に鋼球２１を入れ、ボルト１６の締付力は全て
鋼球２１を介して、部材１９に伝わる構造である。これ
らにより、タマジクウケ８外輪への力が均等化された。Another example is a structure in which a steel ball 21 is inserted between the members 19 and 20 shown in FIG. . As a result, the force applied to the outer ring of Tamajikuke 8 has been equalized.
本構造はメスロータ側にも同一構造とすることが可能で
ある。This structure can also be applied to the female rotor side.
他の実施例として第６図に示す。本図の部材２２と部材
２３の間にバネ２４を設け、部材２２の押付力はバネ２
４にて加え、逆スラスト力については、バネ力で受けず
、部材２２と２８で機械的に拘束する。これらにより、
タマジクウケ８外輪への力が均等化された。Another embodiment is shown in FIG. A spring 24 is provided between the member 22 and the member 23 in this figure, and the pressing force of the member 22 is applied by the spring 2.
4, the reverse thrust force is not received by spring force but is mechanically restrained by members 22 and 28. With these,
The force on the Tamajikuke 8 outer ring has been equalized.
本構造はメスロータ側にも同一構造とすることが可能で
ある。This structure can also be applied to the female rotor side.
本発明によれば、主軸受外輪を締付ける部材を２分割と
し、一方の部材の外径とケークング円径とのすきまをご
くわずかとし、傾きを防止した。According to the present invention, the member for tightening the outer ring of the main bearing is divided into two parts, and the gap between the outer diameter of one member and the diameter of the caking circle is made very small to prevent inclination.
もう一方の部材にはボルトを複数個設け、このボ／’
） Ｑ）Ｗ／８付）ルクな規定することにより、一定の
荷重を得ることができた。これらにより、玉軸受外輪に
は一定の均等荷重が作用することができるので、軸受の
長寿命化が因れる。又、かたよった荷重が作用しないの
で、軸受の早期剥離および７レブテイング等の防止にも
効果がある。又逆スラスト力が玉軸受にかかっても、軸
受外輪の押えが、剛体のため、軸受が固定されるのでス
クリュロータの歯部端面接触防止にも効果がある。The other member has multiple bolts, and this bolt/'
) Q) With W/8) A constant load could be obtained by specifying the load. As a result, a constant and uniform load can be applied to the outer ring of the ball bearing, resulting in a longer life of the bearing. Furthermore, since no uneven load is applied, it is effective in preventing early separation of the bearing and 7-revving. Furthermore, even if a reverse thrust force is applied to the ball bearing, since the bearing outer ring presser is rigid, the bearing is fixed, which is effective in preventing contact with the end surface of the screw rotor teeth.
第１図は、本発明の一実施例のスクリュー圧縮機の横断
面図、第２図は第１図のｔ−ｉ線断面図である。
第８図は、第１図のオスロータ側軸受部の詳細断面図で
ある。
第４図は、他の実施例を示し第１図のオスロータとメス
ロータ側鵬受部位の部分断面図である。
第５図は、更に他の実施例で、第１図のオスロータ側軸
受部位の詳細ｒｒ面図である。
第６図は、更に他の実施例を示し、第１図のオスロータ
側軸受部位の詳細断面図である。
ｌ・・・ケーシング ２・・・オスロータ ８・・
・メスロータ ８・・・タマジクウケ １２・・・
部材１４・・・部材 １６・・・ボルト １８・・
・部材１９・・・部材 ２０・・・部材 ２１・・
・鋼球 ２２・・・部材 ２８・・・部材 ２４
・・・バネ。
案１０
Ｘ−ＴＬ
且
案３０
第４０FIG. 1 is a cross-sectional view of a screw compressor according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line t-i in FIG. 1. FIG. 8 is a detailed sectional view of the male rotor side bearing portion of FIG. 1. FIG. 4 shows another embodiment, and is a partial cross-sectional view of the male rotor and female rotor side support portions of FIG. 1. FIG. 5 is a detailed rr sectional view of the male rotor side bearing portion of FIG. 1 in still another embodiment. FIG. 6 shows still another embodiment, and is a detailed sectional view of the male rotor side bearing portion of FIG. 1. l...Casing 2...Male rotor 8...
・Female rota 8...Tamajikuuke 12...
Member 14... Member 16... Bolt 18...
・Part 19...Part 20...Part 21...
・Steel ball 22... Member 28... Member 24
···Spring. Plan 10 X-TL and Plan 30 40th
Claims (1)
これらを固定する軸受他の部材で構成して成る、スクリ
ュー圧縮機の軸受の一方に玉軸受を設け、この玉軸受の
外輪を直接押す部材とその部材を押さえる別部材を設け
たことを特徴とする、スクリュー圧縮機の軸受押え装置
。 ２、請求項１記載のスクリュー圧縮機の軸受押え装置に
おいて、玉軸受の外輪を直接押す部材とその部材を押さ
える別部材に複数個のボルトを設けたことを特徴とする
、スクリュー圧縮機の軸受押え装置。 ３、請求項２記載の別部材に設けた複数個のボルトを円
周上均等に配置したことを特徴とする、スクリュー圧縮
機の軸受押え装置。 ４、請求項１記載の軸受押え装置において、玉軸受外輪
を直接押す部材の形状がその部材を押さえる別部材との
接触面で線状に接することを特徴とするスクリュー圧縮
機の軸受押え装置。 ５、請求項１記載の軸受押え装置において、玉軸受外輪
を直接押す部材と、その部材を押さえる別部材を、オス
ロータ側とメスロータ側に各々設けたことを特徴とする
スクリュー圧縮機の軸受押え装置。 ６、請求項５記載の軸受押え装置において、その部材を
押さえる別部材をオスロータ側とメスロータ側とを一体
形にしたことを特徴とするスクリュー圧縮機の軸受押え
装置。 ７、請求項１記載の軸受押え装置において、玉軸受の外
輪を直接押す部材とその部材を押さえる別部材の間に球
を介して部材を押すことを、特徴とするスクリュー圧縮
機の軸受押え装置。 ８、請求項１記載の軸受押え装置において、玉軸受の外
輪を直接押す部材とその部材を押さえる別部材の間にバ
ネを設けたことを特徴とするスクリュー圧縮機の軸受押
え装置。[Claims] 1. A ball bearing is provided in one of the bearings of a screw compressor, which is composed of a pair of screw rotors, a bearing for fixing them, and other members in the same casing; A bearing holding device for a screw compressor, comprising a member that directly presses the outer ring of the screw compressor, and a separate member that presses the member. 2. The bearing holding device for a screw compressor according to claim 1, wherein a plurality of bolts are provided on a member that directly presses the outer ring of the ball bearing and a separate member that presses the member. Presser foot device. 3. A bearing holding device for a screw compressor, characterized in that a plurality of bolts provided on the separate member according to claim 2 are arranged evenly on the circumference. 4. The bearing holding device for a screw compressor according to claim 1, wherein the shape of the member that directly presses the outer ring of the ball bearing is in linear contact with another member that presses the member at a contact surface. 5. A bearing holding device for a screw compressor according to claim 1, characterized in that a member that directly presses the ball bearing outer ring and a separate member that presses the member are provided on the male rotor side and the female rotor side, respectively. . 6. The bearing holding device for a screw compressor according to claim 5, wherein the male rotor side and the female rotor side are integrally formed as separate members for holding down the member. 7. The bearing holding device for a screw compressor according to claim 1, wherein the bearing holding device for a screw compressor is characterized in that the member is pushed through a ball between a member that directly presses the outer ring of the ball bearing and another member that presses that member. . 8. A bearing holding device for a screw compressor according to claim 1, characterized in that a spring is provided between a member that directly presses the outer ring of the ball bearing and another member that presses that member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63283631A JPH02130288A (en) | 1988-11-11 | 1988-11-11 | Bearing pressing device for screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63283631A JPH02130288A (en) | 1988-11-11 | 1988-11-11 | Bearing pressing device for screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02130288A true JPH02130288A (en) | 1990-05-18 |
Family
ID=17668018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63283631A Pending JPH02130288A (en) | 1988-11-11 | 1988-11-11 | Bearing pressing device for screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02130288A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4833041A (en) * | 1971-08-28 | 1973-05-07 | ||
| JPS5799294A (en) * | 1980-12-10 | 1982-06-19 | Hitachi Ltd | Screw fluid machine |
| JPS61103013A (en) * | 1984-10-24 | 1986-05-21 | Hitachi Ltd | Device for fixing outer race of thrust bearing or screw compressor |
| JPS61185694A (en) * | 1985-01-02 | 1986-08-19 | アクチ−セルスカベツト ト−マス ズス．サブロエ アンド カンパニ− | Bearing stand |
| JPS63131880A (en) * | 1986-11-21 | 1988-06-03 | Hitachi Ltd | Thrust bearing |
-
1988
- 1988-11-11 JP JP63283631A patent/JPH02130288A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4833041A (en) * | 1971-08-28 | 1973-05-07 | ||
| JPS5799294A (en) * | 1980-12-10 | 1982-06-19 | Hitachi Ltd | Screw fluid machine |
| JPS61103013A (en) * | 1984-10-24 | 1986-05-21 | Hitachi Ltd | Device for fixing outer race of thrust bearing or screw compressor |
| JPS61185694A (en) * | 1985-01-02 | 1986-08-19 | アクチ−セルスカベツト ト−マス ズス．サブロエ アンド カンパニ− | Bearing stand |
| JPS63131880A (en) * | 1986-11-21 | 1988-06-03 | Hitachi Ltd | Thrust bearing |
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