JPH08285017A - Hollow shaft type planetary reduction device, and centrifugal separator using it - Google Patents
Hollow shaft type planetary reduction device, and centrifugal separator using itInfo
- Publication number
- JPH08285017A JPH08285017A JP11799795A JP11799795A JPH08285017A JP H08285017 A JPH08285017 A JP H08285017A JP 11799795 A JP11799795 A JP 11799795A JP 11799795 A JP11799795 A JP 11799795A JP H08285017 A JPH08285017 A JP H08285017A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- planetary
- hollow shaft
- rotation
- hollow
- 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.)
- Granted
Links
Landscapes
- Retarders (AREA)
- Centrifugal Separators (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、遠心分離機等に用いら
れる中空軸形遊星減速装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow shaft type planetary speed reducer used in a centrifugal separator or the like.
【０００２】[0002]
【従来の技術】一般に、高速回転させて汚泥物と水分と
を分離する遠心分離機等に用いられる中空軸形減速装置
としては、単純遊星減速装置やサイクロ減速装置などが
利用されている。2. Description of the Related Art Generally, a simple planetary speed reducer or a cyclo speed reducer is used as a hollow shaft type speed reducer used in a centrifugal separator or the like for rotating sludge at high speed to separate sludge and water.
【０００３】まず、単純遊星減速装置１００としては、
図５に示すように、遠心分離機２００のスクリューコン
ベア２０１（回転搬送体）に接続された中空軸１０２
と、この中空軸部１０２との間に空間Ｚを形成して軸受
１０３で軸支されつつ第１入力プーリ１０４と遠心分離
機２００のケース２０２（中空回転体）とにそれぞれ接
続された回転ケース１０５と、空間Ｚ内に配置され大径
の太陽歯車１０６とこの太陽歯車１０６の軸心を基準に
して太陽歯車１０６と回転ケース１０５の第１内歯車１
０７間を軸受１０８を介して回動する遊星歯車１０９と
からなる２組の遊星歯車機構１１０、１１１と、遊星歯
車機構１１０と第２入力プーリ１１２を連結する枠体１
１３と、遊星歯車機構１１１と中空軸１０２とを連結す
る連結部材１１４とで構成されている。また、遊星歯車
機構１１０、１１１とは、回転ケース１０５に連結され
たケース２０２と中空軸１０２に連結されたスクリュー
コンベア２０１の回転数Ｖ１、Ｖ２の総速比Ｉが、例え
ば、Ｉ＝２０となるようにされている。そして、各入力
プーリ１１０、１１２で回転ケース１０５と中空軸１０
２とをほぼ同一の回転数Ｖ３、Ｖ４（但し、Ｖ３＞Ｖ
４）で回転すると、２組の遊星歯車機構１１０、１１１
により回転ケース１０５に連結されたケース２０２が回
転数Ｖ１＝Ｖ３で、又中空軸１０２に連結されたスクリ
ューコンベア２０１が回転数Ｖ２＝Ｖ３−（Ｖ３−Ｖ
４）／Ｉでそれぞれ回転して、即ち、入力時の第１入力
部１０１と第２入力部１１２との回転数の差を減速（小
さくして）して、中空軸形減速装置１００の中空軸１０
２内から順次、遠心分離機２００内に送り込まれる水溶
性の汚泥等を、水溶液と汚泥とに遠心分離しつつ、スク
リューコンベア２０１で汚泥を搬送して遠心分離外に取
り出すものである。First, as the simple planetary speed reducer 100,
As shown in FIG. 5, the hollow shaft 102 connected to the screw conveyor 201 (rotary carrier) of the centrifuge 200.
And a rotating case connected to the first input pulley 104 and the case 202 (hollow rotating body) of the centrifuge 200 while forming a space Z between the hollow shaft 102 and the bearing 103. 105, a large-diameter sun gear 106 arranged in the space Z, and the sun gear 106 and the first internal gear 1 of the rotating case 105 based on the axis of the sun gear 106.
Two sets of planetary gear mechanisms 110 and 111 composed of a planetary gear 109 that rotates between 07 and a bearing 108, and a frame body 1 that connects the planetary gear mechanism 110 and the second input pulley 112.
13 and a connecting member 114 that connects the planetary gear mechanism 111 and the hollow shaft 102. In addition, the planetary gear mechanisms 110 and 111 have a total speed ratio I of the rotation speeds V1 and V2 of the case 202 connected to the rotating case 105 and the screw conveyor 201 connected to the hollow shaft 102, for example, I = 20. It is supposed to be. The rotating case 105 and the hollow shaft 10 are connected to the input pulleys 110 and 112.
2 and almost the same number of rotations V3, V4 (however, V3> V
When rotated in 4), two sets of planetary gear mechanisms 110, 111
The case 202 connected to the rotating case 105 has a rotation speed V1 = V3, and the screw conveyor 201 connected to the hollow shaft 102 has a rotation speed V2 = V3- (V3-V
4) / I, respectively, that is, the rotation speed difference between the first input unit 101 and the second input unit 112 at the time of input is reduced (decreased) to reduce the hollow of the hollow shaft type speed reducer 100. Axis 10
The water-soluble sludge and the like, which are sequentially fed into the centrifuge 200 from inside 2, are centrifugally separated into an aqueous solution and sludge, and the sludge is conveyed by the screw conveyor 201 and taken out of the centrifuge.
【０００４】また、サイクロ減速装置２５０としては、
図６に示すように、外周に減速比に等しい歯数のサイク
ロイダル曲線が刻まれた曲線板２５１と、高速軸２５２
に固定され軸受を介して曲線板２５１の中心に対して偏
心量θを持って軸支される偏心体２５３と、曲線板２５
１の外周にこの歯数より１本多く設けられた外ピン２５
４と、曲線板２５１に設けられた貫通孔２５６内に嵌合
される複数の内ピン２５７を有する低速度軸２５８とを
主要部として構成されている。そして、高速軸２５２が
回転すると、偏心体２５３と曲線板２５１は外ピン２５
４の中心まわりに偏心運動を起こすと共に、曲線板２５
１の歯形が外ピン２５４に押し付けられ、その結果、１
回の偏心運動の間に曲線板２５１は、１歯ずつ偏心運動
方向と逆の方向に動かされて減速し、この減速された運
動を内ピン２５７を介して低速軸２５８に伝達する。Further, as the cyclodeceleration device 250,
As shown in FIG. 6, a curved plate 251 having a cycloidal curve with the number of teeth equal to the reduction ratio engraved on the outer periphery, and a high speed shaft 252.
And an eccentric body 253 which is fixed to the center of the curved plate 251 via a bearing and is axially supported with an eccentricity θ.
An outer pin 25 provided on the outer circumference of 1 by one more than this number of teeth
4 and a low speed shaft 258 having a plurality of inner pins 257 fitted in through holes 256 formed in the curved plate 251 as main parts. Then, when the high speed shaft 252 rotates, the eccentric body 253 and the curved plate 251 move to the outer pin 25.
4 causes an eccentric movement around the center of the curved plate 25
The tooth profile of 1 is pressed against the outer pin 254, resulting in 1
During one eccentric movement, the curved plate 251 is moved one tooth at a time in the direction opposite to the eccentric movement direction to decelerate, and the decelerated movement is transmitted to the low speed shaft 258 via the inner pin 257.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来技
術の単純遊星減速装置では、各遊星歯車機構１１０、１
１１が太陽歯車１０６と遊星歯車１０９とで構成されて
いるので、回転ケース１０５と中空軸１０２を回転させ
ると、図７に示すように、太陽歯車１０６、遊星歯車１
０９には回転ケース１０５に向かう遠心力Ｆ１、Ｆ２
が、又回転ケース１０５には太陽歯車１０６に向かう遠
心力Ｆ３が作用する（但し、遠心力Ｆ１とＦ３は相殺さ
れる。）と共に、太陽歯車１０６と遊星歯車１０９との
間、及び遊星歯車１０９と第１内歯車１０７（回転ケー
ス１０５）との間にはそれぞれ接線同方向の接線力ｆ
１、ｆ２、ｆ３が発生してこれらの合成力ｆが軸受１０
８に作用するので、遊星歯車１０９の軸受１０８の強度
や中空軸１０２及び回転ケース１０５のバランスの対策
上、遠心力等を極力低く抑えるために、この中空軸１０
２と回転ケース１０５間の空間を小さく抑えて減速装置
全体を小型化する必要があり、例えば、遠心分離機２０
０により遠心分離される物体を大量に送り込むために、
中空軸１０２の径を大きくすると、これに比例して太陽
歯車１０６、遊星歯車１０９、軸受１０８等が小さくな
るので、上記遠心力Ｆ３や合成力ｆが作用すると、その
軸受１０８の寿命や各歯車１０６、１０９の強度が短く
なり、十分な回転速度速度を確保できない問題があっ
た。However, in the conventional simple planetary speed reducer, each planetary gear mechanism 110, 1 is used.
Since 11 is composed of the sun gear 106 and the planetary gear 109, when the rotating case 105 and the hollow shaft 102 are rotated, the sun gear 106 and the planetary gear 1 are rotated as shown in FIG.
The centrifugal forces F1 and F2 toward the rotating case 105 are included in 09.
However, the centrifugal force F3 directed to the sun gear 106 acts on the rotating case 105 (however, the centrifugal forces F1 and F3 cancel each other out), and the sun gear 106 and the planet gears 109 as well as the planet gears 109. And the first internal gear 107 (rotating case 105) are tangential force f in the same tangent direction.
1, f2, f3 are generated, and the combined force f of these is generated by the bearing 10
In order to suppress the centrifugal force and the like as much as possible, the hollow shaft 10 acts on the bearing 10 of the planetary gear 109 and the balance between the hollow shaft 102 and the rotating case 105.
It is necessary to keep the space between the rotary case 105 and the rotary case 105 small and to reduce the size of the entire reduction gear device.
In order to send in large quantities of objects that are centrifuged by 0,
When the diameter of the hollow shaft 102 is increased, the sun gear 106, the planetary gear 109, the bearing 108, etc. are reduced in proportion to this. Therefore, when the centrifugal force F3 or the synthetic force f acts, the life of the bearing 108 and each gear There was a problem that the strength of 106 and 109 was shortened and a sufficient rotation speed could not be secured.
【０００６】また、サイクロ減速装置２５０では、曲線
板２５１の偏心による振動を避けるため、通常、２枚の
曲線板を相互に１８０°位相そずらして使用している
が、この場合でも、高速軸２５２の偶力による振動を避
けることができず、遠心分離機に適用して高速回転する
ことが困難であるという問題があった。Further, in the cyclodeceleration device 250, usually two curved plates are used 180 ° out of phase with each other in order to avoid the vibration due to the eccentricity of the curved plate 251, but even in this case, the high speed shaft is also used. There is a problem in that vibration due to the couple of 252 cannot be avoided, and it is difficult to apply it to a centrifugal separator and rotate at high speed.
【０００７】本発明は、このような問題を解決するため
になされたもので、中空軸の径を十分に確保しながら、
十分な軸受寿命と歯車の強度を得られ、且つ高速性能に
優れた中空軸形減速装置及びそれを用いた遠心分離機を
提供することを目的とする。The present invention has been made to solve such a problem, and while ensuring a sufficient diameter of the hollow shaft,
It is an object of the present invention to provide a hollow shaft type speed reducer capable of obtaining a sufficient bearing life and gear strength and excellent in high speed performance, and a centrifuge using the same.
【０００８】[0008]
【課題を解決するための手段】上記問題を解決するた
め、本発明の中空軸形減速装置及びそれを有する遠心分
離機では、請求項１においては、中空軸と、前記中空軸
の外側に回転可能に軸支された遊星枠と、前記遊星枠に
回転を伝達する第２入力部と、前記遊星枠に軸受を介し
て回転可能に軸支された遊星歯車と、前記遊星歯車を覆
って当該遊星歯車に第１内歯車を介して噛合する回転ケ
ースと、前記回転ケースに回転を伝達する第１入力部
と、前記中空軸と前記遊星歯車を第２内歯車を介して連
結する連結部材と、前記回転ケースからの回転を出力す
る第１出力部と、前記中空軸からの回転を出力する第２
出力部とを備え、前記第１内歯車と前記第２内歯車と
は、相互に歯数に差を設けて前記遊星歯車に噛合してい
るものである。In order to solve the above problems, in a hollow shaft type speed reducer and a centrifuge having the same according to the present invention, in claim 1, the hollow shaft and the outer periphery of the hollow shaft are rotated. A planet frame that is rotatably supported, a second input portion that transmits rotation to the planet frame, a planet gear that is rotatably supported by a bearing on the planet frame, and a planet gear that covers the planet gear. A rotating case that meshes with a planetary gear via a first internal gear, a first input portion that transmits rotation to the rotating case, and a connecting member that connects the hollow shaft and the planetary gear via a second internal gear. A first output portion that outputs rotation from the rotating case and a second output portion that outputs rotation from the hollow shaft
An output unit is provided, and the first internal gear and the second internal gear are meshed with the planetary gear with different numbers of teeth.
【０００９】請求項２においては、中空回転体と、前記
中空回転内に回転可能に設けられた回転搬送体とを有
し、前記中空回転体及び前記回転搬送体とが中空軸形遊
星減速装置で減速された回転数で回転される遠心分離機
であって、前記中空軸形遊星減速装置が、中空軸と、前
記中空軸の外側に回転可能に軸支された遊星枠と、前記
遊星枠に回転を伝達する第２入力部と、前記遊星枠に軸
受を介して回転可能に軸支された遊星歯車と、前記遊星
歯車を覆って当該遊星歯車に第１内歯車を介して噛合す
る回転ケースと、前記回転ケースに回転を伝達する第１
入力部と、前記中空軸と前記遊星歯車を第２内歯車を介
して連結する連結部材と、前記回転ケースからの回転を
出力する第１出力部と、前記中空軸からの回転を出力す
る第２出力部とを備え、前記第１内歯車と前記第２内歯
車とは、相互に歯数に差を設けて前記遊星歯車に噛合し
ていると共に、前記第１出力部が前記中空回転体に、前
記第２出力部が前記回転搬送体にそれぞれ連結されてい
るものである。According to another aspect of the present invention, there is provided a hollow rotary body and a rotary carrier rotatably provided in the hollow rotary body, wherein the hollow rotary body and the rotary carrier are hollow shaft type planetary speed reducers. In the centrifuge, the hollow shaft type planetary speed reducer is rotated at a reduced speed by a hollow shaft, a planetary frame rotatably supported outside the hollow shaft, and the planetary frame. A second input portion for transmitting rotation to the planetary gear, a planetary gear rotatably supported by the planetary frame via bearings, and a rotation that covers the planetary gear and meshes with the planetary gear via the first internal gear. A case and a first case for transmitting rotation to the rotating case
An input unit, a connecting member that connects the hollow shaft and the planetary gear via a second internal gear, a first output unit that outputs rotation from the rotating case, and a first output unit that outputs rotation from the hollow shaft Two output parts are provided, and the first internal gear and the second internal gear are meshed with the planetary gears with a difference in the number of teeth, and the first output part has the hollow rotating body. In addition, the second output units are respectively connected to the rotary carrier.
【００１０】[0010]
【作用】このように本発明の中空形減速装置及びそれを
用いた遠心分離機によれば、遊星歯車機構を遊星歯車の
みで構成して空間に配置し、且つ遊星歯車と中空軸とを
連結部材に形成された第２内歯車で連結すると共に、第
１歯車と第２歯車とは、相互に歯数に差を設けて遊星歯
車に噛合しているので、太陽歯車を配置しない分だけ中
空軸の径や遊星歯車を大きくすることができると共に、
第１内歯車と第２内歯車との遠心力及び接線力を相互に
反対方向に作用するようにして減速効果を発揮させるて
軸受に作用する力を接線力の偶力とすることができの
で、十分な軸受の寿命と遊星歯車の強度を得つつ、高速
性能を向上させることが可能となる。As described above, according to the hollow speed reducer of the present invention and the centrifugal separator using the same, the planetary gear mechanism is configured only with the planetary gears and is arranged in the space, and the planetary gears and the hollow shaft are connected. Since the first internal gear and the second internal gear are connected to each other by the second internal gear formed on the member and mesh with the planetary gears by providing a difference in the number of teeth between them, it is hollow as long as the sun gear is not arranged. The diameter of the shaft and the planetary gear can be increased,
Since the centrifugal force and the tangential force of the first internal gear and the second internal gear act in mutually opposite directions to exert the deceleration effect and the force acting on the bearing can be used as the couple of the tangential force. It is possible to improve high-speed performance while obtaining sufficient bearing life and planetary gear strength.
【００１１】[0011]
【実施例】以下、本発明の一実施例である中空軸形減速
装置及びそれを用いた遠心分離機について、図面を参照
して説明する。図１は本実施例における中空軸形減速装
置の構成を示す一部断面図、図２は本実施例における中
空軸減速装置の構成を示す模式記号図、図３は本実施例
の中空軸形減速装置が用いられる遠心分離機の構成を示
す断面図、図４は本実施例における中空軸減速装置の回
転の際に作用する力関係を示す図１のＡ−Ａ断面図であ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hollow shaft type speed reducer and a centrifuge using the same according to an embodiment of the present invention will be described below with reference to the drawings. 1 is a partial cross-sectional view showing the structure of a hollow shaft type speed reducer in the present embodiment, FIG. 2 is a schematic symbol view showing the structure of the hollow shaft type speed reducer in the present embodiment, and FIG. 3 is a hollow shaft type in the present embodiment. FIG. 4 is a cross-sectional view showing the configuration of a centrifuge in which the speed reducer is used, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. 1 showing a force relationship that acts during rotation of the hollow shaft speed reducer in this embodiment.
【００１２】図１及び図２において、１は中空軸減速装
置であって、中空軸２、遊星歯車３及び回転ケース４を
主要部として構成されている。この中空軸２は、軸部２
Ａとこの軸部２Ａの一端側に半径外方向に突出するフラ
ンジ部２Ｂと、このフランジ部２Ｂから軸線方向に延び
る大径軸部２Ｃとが一体形成されたもので、このフラン
ジ部２Ｂの外周面には歯車６が形成されている。また、
中空軸２の軸部２Ａには、このフランジ部２Ｂが突出す
る反対側から遊星枠７が両端部に軸受８、９を介して回
動可能に軸支されている。この遊星枠７は、第１枠部７
Ａ及び第２枠部７Ｂに２分割されており、この第１枠部
７Ａと第７枠部との間に遊星歯車３が配置されている。
遊星歯車３は、両端部が各枠部７Ａ、７Ｂに形成された
凹部１０、１０内に軸受１１、１１を介して回転可能に
された軸部１２と、この軸部１２に一体形成され遊星枠
７の外周面から半径外方向に突出する歯車部１３とで構
成されている。また、遊星枠７の第１枠部７Ａは、第２
入力プーリ１４に接続されており、この第２入力プーリ
１４が駆動源６０（駆動モータ）で回動されると共に、
遊星枠７を介して同方向に遊星歯車３が回動される。In FIGS. 1 and 2, reference numeral 1 is a hollow shaft speed reducer, which is mainly composed of a hollow shaft 2, a planetary gear 3, and a rotating case 4. The hollow shaft 2 has a shaft portion 2
A, a flange portion 2B protruding outward in the radial direction on one end side of the shaft portion 2A, and a large-diameter shaft portion 2C extending in the axial direction from the flange portion 2B are integrally formed, and the outer periphery of the flange portion 2B A gear 6 is formed on the surface. Also,
On the shaft portion 2A of the hollow shaft 2, a planetary frame 7 is rotatably supported at both ends via bearings 8 and 9 from the opposite side from which the flange portion 2B projects. This planetary frame 7 includes the first frame portion 7
It is divided into two parts, A and the second frame part 7B, and the planetary gear 3 is arranged between the first frame part 7A and the seventh frame part.
The planetary gear 3 has a shaft portion 12 rotatably through bearings 11 and 11 in recesses 10 and 10 formed in the frame portions 7A and 7B at both ends, and a planetary gear formed integrally with the shaft portion 12. The outer peripheral surface of the frame 7 and the gear portion 13 projecting radially outward. Further, the first frame portion 7A of the planetary frame 7 is
The second input pulley 14 is connected to the input pulley 14 and is rotated by the drive source 60 (drive motor).
The planetary gear 3 is rotated in the same direction via the planetary frame 7.
【００１３】回転ケース４は、遊星歯車３を外側から覆
って収納する空間Ａを有する軸状体であって、遊星枠７
と中空軸２の大径軸部２Ｃとのそれぞれに外嵌された軸
受１５、１６により遊星枠７と中空軸２とに回動自在に
軸支されている。この回転ケース４の第１枠部７Ａ側の
端部は、駆動源６０（駆動モータ）で回動される第１入
力プーリ１７に接続されて回動されると共に、この内周
面７ａのには、遊星歯車３に噛み合う第１内歯車１８が
設けられている。また、回転ケース４と遊星歯車３間の
隙間Ｈには、連結部材となる継手歯車２０が配置されて
いる。この継手歯車２０は、回転ケース４の第１内歯車
１８の近傍から中空軸２の大径軸部２Ｃ側に突出して折
れ曲がってフランジ部２Ｂの歯車部６まで延びる断面凹
形状を有しており、フランジ部２Ｂの歯車６に噛合する
歯車２１と、遊星歯車３に噛合して円周の亘って形成さ
れた第２内歯車２２とがそれぞれ形成されている。ま
た、第１内歯車１８と第２内歯車２２とは、それぞれの
歯数Ｚ１、Ｚ２に差が設けられている。尚、３０、３１
は遊星枠７と中空軸２との間に介装されたオイルシール
材、３２、３３は回転ケース４と遊星枠７又は中空軸２
の大径部２Ｃとの間に介装されたオイルシール材、３４
は第１内歯車１８と回転ケース４間に介装されたプレー
ト材である。尚、遊星歯車３は、第１内歯車１８の周方
向に所定間隔を隔てて複数設けられている。The rotating case 4 is a shaft-like body having a space A for housing the planetary gear 3 while covering the planetary gear 3 from the outside.
And the large-diameter shaft portion 2C of the hollow shaft 2 are rotatably supported by the planetary frame 7 and the hollow shaft 2 by bearings 15 and 16 which are externally fitted. The end portion of the rotating case 4 on the side of the first frame portion 7A is connected to the first input pulley 17 which is rotated by a drive source 60 (driving motor) and is rotated, and at the same time the inner peripheral surface 7a is covered. Is provided with a first internal gear 18 that meshes with the planetary gear 3. Further, in the gap H between the rotating case 4 and the planetary gear 3, a joint gear 20 serving as a connecting member is arranged. The joint gear 20 has a concave cross-sectional shape that protrudes from the vicinity of the first internal gear 18 of the rotating case 4 toward the large diameter shaft portion 2C of the hollow shaft 2 and is bent to extend to the gear portion 6 of the flange portion 2B. A gear 21 that meshes with the gear 6 of the flange portion 2B and a second internal gear 22 that meshes with the planetary gear 3 and is formed over the circumference are formed. Further, the first internal gear 18 and the second internal gear 22 are provided with a difference in the number of teeth Z1 and Z2. In addition, 30, 31
Is an oil seal material interposed between the planet frame 7 and the hollow shaft 2, and 32 and 33 are the rotating case 4 and the planet frame 7 or the hollow shaft 2.
Oil seal material interposed between the large diameter portion 2C of the
Is a plate member interposed between the first internal gear 18 and the rotating case 4. A plurality of planetary gears 3 are provided at predetermined intervals in the circumferential direction of the first internal gear 18.
【００１４】そして、中空軸形減速装置１は、図３に示
される遠心分離機５０に連結される。図１及び図２の遠
心分離機５０は、中空回転体となる筒状ボール体５１
と、この筒状ボール体５１に内装されたスクリューコン
ベア５２とを主要部として構成されている。このスクリ
ューコンべア５２は、回転軸５３とこの回転軸５３の半
径外方向に延びる複数枚の攪乱板部５４とを有してお
り、水溶性の汚泥を攪乱板部５４で攪乱させながら水溶
液と汚泥に遠心分離する。また、遠心分離機５０は、中
空軸形減速装置１の中空軸２を第２出力部４０としてス
クリューコンベア５２に連結され、又回転ケース４を第
１出力部４１として筒状ボール体１２に連結されてい
る。The hollow shaft type speed reducer 1 is connected to the centrifuge 50 shown in FIG. The centrifuge 50 shown in FIGS. 1 and 2 has a cylindrical ball body 51 as a hollow rotating body.
And a screw conveyor 52 installed in the cylindrical ball body 51 as main parts. The screw conveyer 52 has a rotating shaft 53 and a plurality of disturbing plate portions 54 extending outward in the radial direction of the rotating shaft 53, and the aqueous solution is disturbed by the disturbing plate portion 54 to dissolve the water-soluble sludge. And centrifuge into sludge. In the centrifuge 50, the hollow shaft 2 of the hollow shaft type speed reducer 1 is connected to the screw conveyor 52 as the second output unit 40, and the rotating case 4 is connected to the tubular ball body 12 as the first output unit 41. Has been done.
【００１５】本実施例の中空軸形減速装置１及びそれを
用いた遠心分離機５０は、以上のように構成されるが、
次に、本実施例の中空軸形減速装置１及び遠心分離機５
０の作動について説明する。The hollow shaft type speed reducer 1 of the present embodiment and the centrifuge 50 using the same are configured as described above.
Next, the hollow shaft type speed reducer 1 and the centrifuge 5 of the present embodiment.
The operation of 0 will be described.
【００１６】先ず、図示しない駆動源を駆動して、第１
入力プーリ１７と第２入力プーリ１４とを同方向にぼぼ
同一の回転数Ｖａ、Ｖｂにして回転（但し、Ｖａ＞Ｖ
ｂ）すると、回転ケース４が軸受１５、１６を介して回
転されると共に、遊星枠７を介して遊星歯車３が回転す
る。そして、回転ケース４と遊星枠７とが回転すると、
第１内歯車１８と第２内歯車２２との歯数Ｚ１、Ｚ２の
差があるので、第１出力部４１の回転数Ｖｃと第２出力
部４０の回転数Ｖｄとの速度比Ｉが、Ｉ＝Ｚ２／（Ｚ１
−Ｚ２）とされることから、第１出力部４１の回転数Ｖ
ｃがＶａ、第２出力部４０の回転数ＶｄがＶｄ＝Ｖａ−
（Ｖａ−Ｖｂ）／Ｉとされて、遠心分離機５０の筒状ボ
ール体５１、スクリューコンベア５２に伝達されてそれ
ぞれが回転数Ｖｃ、Ｖｄで回転する。これにより、各入
力プーリ１４、１７で回転される遊星枠７又は回転ケー
スの回転数Ｖａ、Ｖｂの差を、第１内歯車１８と第２歯
車２２との歯数差で減速して（小さくして）、第１出力
部４１又は第２出力部４０で回転される遠心分離機５０
の筒状ボール体５１とスクリューコンベア５２とを回転
Ｖｃ、Ｖｄとすることができる。First, by driving a drive source (not shown), the first
The input pulley 17 and the second input pulley 14 are rotated in the same direction at almost the same rotation speeds Va and Vb (where Va> V
Then, the rotating case 4 is rotated via the bearings 15 and 16 and the planetary gear 3 is rotated via the planetary frame 7. When the rotating case 4 and the planet frame 7 rotate,
Since there is a difference in the number of teeth Z1 and Z2 between the first internal gear 18 and the second internal gear 22, the speed ratio I between the rotational speed Vc of the first output unit 41 and the rotational speed Vd of the second output unit 40 is I = Z2 / (Z1
-Z2), the rotation speed V of the first output unit 41
c is Va, and the rotation speed Vd of the second output unit 40 is Vd = Va−
(Va-Vb) / I, which is transmitted to the cylindrical ball body 51 of the centrifuge 50 and the screw conveyor 52 to rotate at the rotation speeds Vc and Vd, respectively. Accordingly, the difference between the rotation speeds Va and Vb of the planetary frame 7 or the rotating case rotated by the input pulleys 14 and 17 is reduced by the difference in the number of teeth between the first internal gear 18 and the second gear 22 (small. Then, the centrifuge 50 rotated by the first output unit 41 or the second output unit 40.
The cylindrical ball body 51 and the screw conveyor 52 can be rotated Vc and Vd.
【００１７】このとき、中空軸形遊星減速装置１の遊星
歯車３と回転ケース４が回転すると、図４に示すよう
に、遊星歯車３に回転ケース４に向かう遠心力Ｆａと、
回転ケース４に遊星歯車３に向かう遠心力Ｆｂとが相互
に反する方向に作用すると共に、遊星歯車３に噛合する
第１内歯車１８と第２内歯車２２をはその噛合部分で相
互に反対方向に作用する接線力ｆａ、ｆｂが作用する
が、各遠心力ＦａとＦｂとは相殺され、また、各接線力
ｆａとｆｂとは互いに方向が逆であるので遊星歯車３の
軸受１１、１１等には偶力が作用するだけになる。At this time, when the planetary gear 3 and the rotating case 4 of the hollow shaft type planetary speed reducer 1 rotate, as shown in FIG. 4, the planetary gear 3 has a centrifugal force Fa toward the rotating case 4,
The centrifugal force Fb toward the planetary gears 3 acts on the rotating case 4 in directions opposite to each other, and the first internal gear 18 and the second internal gear 22 meshing with the planetary gears 3 are in opposite directions at their meshing portions. The centrifugal forces Fa and Fb cancel each other out, and since the tangential forces fa and fb are opposite in direction to each other, the bearings 11, 11 of the planetary gear 3, etc. A couple acts only on.
【００１８】次いで、遠心分離機５０の筒状ボール体５
１とスクリューコンベア５２とが回転すると、中空軸２
内と通って遠心分離機５０内に、順次送り込まれる水溶
性の汚泥が、中空軸２とスクリューコンベア５２の回転
軸５３との間に形成された連絡孔５５を介して筒状ボー
ル体５１内に流れ込む。そして、スクリューコンベア５
２の回転により、この複数の攪乱板部５４で攪拌されつ
つその遠心力で質量の軽い水溶液が筒状ボール体５１の
上方面に沿ってその回転により図示しない液排出口に搬
送されると共に、質量が重い水溶液が分離された汚泥
が、スクリューコンベア５２の回転による遠心力でその
濃縮度を増しつつ（水溶液の包含量を減少しつつ）、筒
状ボール５１内の下部に沈澱してスクリューコンベア５
２の攪乱板部５４で図示しない濃縮排出口に搬送され
て、水溶液と濃縮汚泥とに遠心分離する。Next, the cylindrical ball body 5 of the centrifuge 50.
When the 1 and the screw conveyor 52 rotate, the hollow shaft 2
Water-soluble sludge sequentially fed into the centrifugal separator 50 through the inside of the tubular ball body 51 through a communication hole 55 formed between the hollow shaft 2 and the rotary shaft 53 of the screw conveyor 52. Flow into. And the screw conveyor 5
By the rotation of 2, the aqueous solution having a small mass due to the centrifugal force while being stirred by the plurality of disturbing plate portions 54 is conveyed along the upper surface of the cylindrical ball 51 to the liquid discharge port (not shown) by the rotation. The sludge, from which the aqueous solution having a large mass is separated, precipitates in the lower part of the cylindrical ball 51 while increasing its concentration (decreasing the content of the aqueous solution) by the centrifugal force generated by the rotation of the screw conveyor 52, and the screw conveyor. 5
It is conveyed to a concentration discharge port (not shown) by the disturbing plate portion 54 of No. 2 and is centrifuged into an aqueous solution and a concentrated sludge.
【００１９】[0019]
【発明の効果】このように本発明の中空形遊星減速装置
によれば、遊星歯車機構を遊星歯車のみで構成して空間
に配置し、且つ遊星歯車と中空軸とを連結部材に形成さ
れた第２内歯車で連結すると共に、第１歯車と第２歯車
とは、相互に歯数に差を設けて遊星歯車に噛合している
ので、太陽歯車を配置しない分だけ中空軸の径や遊星歯
車を大きくすることができると共に、第１内歯車と第２
内歯車との遠心力及び接線力を相互に反対方向に作用す
るようにして減速効果を発揮させるて軸受に作用する力
を接線力の偶力とすることができ、例え、中空軸の径を
大きくしても、十分な軸受の寿命と遊星歯車の強度を得
つつ、高速性能を向上させることが可能となる。この結
果、本発明の中空軸形遊星減速機を遠心分離機に用いた
場合にも、軸受の寿命や歯車の強度を得つつ、中空回転
体及び回転搬送体の回転数差を小さくして、高速回転さ
せて中空軸内から搬送される分離物体を素早く、分離す
ることが可能となる。As described above, according to the hollow planetary speed reducer of the present invention, the planetary gear mechanism is composed only of the planetary gears and arranged in the space, and the planetary gears and the hollow shaft are formed in the connecting member. Since the first gear and the second gear are connected to each other by the second internal gear and are meshed with the planetary gear with a difference in the number of teeth between them, the diameter of the hollow shaft and the planetary gear are not increased because the sun gear is not arranged. The gear can be made larger, and the first internal gear and the second gear
The centrifugal force and tangential force with the internal gear act in mutually opposite directions to exert the deceleration effect and the force acting on the bearing can be used as the couple of the tangential force. Even if it is increased, it is possible to improve high-speed performance while obtaining a sufficient bearing life and planetary gear strength. As a result, even when the hollow shaft type planetary speed reducer of the present invention is used in a centrifugal separator, while reducing the rotational speed difference between the hollow rotor and the rotary carrier while obtaining the life of the bearing and the strength of the gear, It becomes possible to quickly separate the separated object that is conveyed from inside the hollow shaft by rotating at high speed.
【図１】本発明の一実施例における中空軸形遊星減速装
置の構成を示す一部断面図である。FIG. 1 is a partial cross-sectional view showing the structure of a hollow shaft type planetary speed reducer according to an embodiment of the present invention.
【図２】本発明の一実施例における中空軸形遊星減速装
置の構成を示す模式記号図である。FIG. 2 is a schematic symbol diagram showing a configuration of a hollow shaft type planetary speed reducer in one embodiment of the present invention.
【図３】本発明の一実施例における中空軸形遊星減速装
置が用いられる遠心分離機の構成を説明するための断面
図である。FIG. 3 is a cross-sectional view illustrating the configuration of a centrifuge in which a hollow shaft type planetary speed reducer according to an embodiment of the present invention is used.
【図４】本発明の一実施例における中空軸減速装置の回
転の際に作用する力関係を示す図１のＡ−Ａ断面図であ
る。FIG. 4 is a cross-sectional view taken along the line AA of FIG. 1 showing a force relationship that acts during rotation of the hollow shaft reduction gear device according to the embodiment of the present invention.
【図５】従来技術における単純遊星減速装置の構成を示
す模式記号図である。FIG. 5 is a schematic symbol diagram showing a configuration of a simple planetary speed reducer in a conventional technique.
【図６】従来技術におけるサイクロ減速装置の構成を示
す視斜図である。FIG. 6 is a perspective view showing a configuration of a cyclo speed reducer in the related art.
【図７】従来技術における単純遊星減速機の回転の際に
作用する力の関係を示す断面図である。FIG. 7 is a cross-sectional view showing a relationship of forces acting during rotation of a simple planetary speed reducer in the related art.
２ 中空軸 ３ 遊星歯車 ４ 回転ケース １３ 遊星歯車 １４ 第２入力プーリ（第２入力部） １７ 第１入力プーリ（第１入力部） １８ 第１内歯車 ２０ 継手歯車（連結部材） ２２ 第２内歯車 ４０ 第２出力部 ４１ 第１出力部 ５１ 筒状ボール体（中空回転体） ５２ スクリューコンベア（回転搬送体） 2 Hollow shaft 3 Planetary gear 4 Rotating case 13 Planetary gear 14 Second input pulley (second input part) 17 First input pulley (first input part) 18 First internal gear 20 Joint gear (connecting member) 22 Second internal Gear 40 Second output section 41 First output section 51 Cylindrical ball body (hollow rotating body) 52 Screw conveyor (rotary carrier)
Claims (2)
に軸支された遊星枠と、前記遊星枠に回転を伝達する第
２入力部と、前記遊星枠に軸受を介して回転可能に軸支
された遊星歯車と、前記遊星歯車を覆って当該遊星歯車
に第１内歯車を介して噛合する回転ケースと、前記回転
ケースに回転を伝達する第１入力部と、前記中空軸と前
記遊星歯車を第２内歯車を介して連結する連結部材と、
前記回転ケースからの回転を出力する第１出力部と、前
記中空軸からの回転を出力する第２出力部とを備え、 前記第１内歯車と前記第２内歯車とは、相互に歯数に差
を設けて前記遊星歯車に噛合していることを特徴とする
中空径遊星減速装置。1. A hollow shaft, a planetary frame rotatably supported on the outside of the hollow shaft, a second input section for transmitting rotation to the planetary frame, and a planetary frame rotatable via bearings. A planetary gear that is axially supported by the rotary gear, a rotary case that covers the planetary gear and meshes with the planetary gear via a first internal gear, a first input portion that transmits rotation to the rotary case, and the hollow shaft. A connecting member that connects the planetary gears through a second internal gear;
A first output unit that outputs rotation from the rotating case and a second output unit that outputs rotation from the hollow shaft are provided, and the first internal gear and the second internal gear have mutually the number of teeth. A hollow-diameter planetary speed reducer characterized in that the planetary gears are meshed with each other with a difference.
能に設けられた回転搬送体とを有し、前記中空回転体及
び前記回転搬送体とが中空軸形遊星減速装置で減速され
た回転数で回転される遠心分離機であって、 前記中空軸形遊星減速装置が、中空軸と、前記中空軸の
外側に回転可能に軸支された遊星枠と、前記遊星枠に回
転を伝達する第２入力部と、前記遊星枠に軸受を介して
回転可能に軸支された遊星歯車と、前記遊星歯車を覆っ
て当該遊星歯車に第１内歯車を介して噛合する回転ケー
スと、前記回転ケースに回転を伝達する第１入力部と、
前記中空軸と前記遊星歯車を第２内歯車を介して連結す
る連結部材と、前記回転ケースからの回転を出力する第
１出力部と、前記中空軸からの回転を出力する第２出力
部とを備え、 前記第１内歯車と前記第２内歯車とは、相互に歯数に差
を設けて前記遊星歯車に噛合していると共に、 前記第１出力部が前記中空回転体に、前記第２出力部が
前記回転搬送体にそれぞれ連結されていることを特徴と
する遠心分離機。2. A hollow rotary body and a rotary transfer body rotatably provided in the hollow rotary body, wherein the hollow rotary body and the rotary transfer body are decelerated by a hollow shaft type planetary speed reducer. A centrifugal separator rotated at a rotation speed, wherein the hollow shaft type planetary speed reducer transmits a rotation to a hollow shaft, a planetary frame rotatably supported outside the hollow shaft, and the planetary frame. A second input portion, a planetary gear rotatably supported by the planetary frame via a bearing, a rotary case that covers the planetary gear and meshes with the planetary gear via a first internal gear, A first input section for transmitting rotation to the rotating case;
A connecting member that connects the hollow shaft and the planetary gear via a second internal gear, a first output unit that outputs rotation from the rotating case, and a second output unit that outputs rotation from the hollow shaft. The first internal gear and the second internal gear are meshed with the planetary gear with a difference in the number of teeth, and the first output portion is provided in the hollow rotating body, A centrifuge characterized in that two output parts are connected to the rotary carrier, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11799795A JP2847044B2 (en) | 1995-04-18 | 1995-04-18 | Hollow shaft type planetary reduction gear and centrifugal separator using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11799795A JP2847044B2 (en) | 1995-04-18 | 1995-04-18 | Hollow shaft type planetary reduction gear and centrifugal separator using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08285017A true JPH08285017A (en) | 1996-11-01 |
| JP2847044B2 JP2847044B2 (en) | 1999-01-13 |
Family
ID=14725492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11799795A Expired - Fee Related JP2847044B2 (en) | 1995-04-18 | 1995-04-18 | Hollow shaft type planetary reduction gear and centrifugal separator using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2847044B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003326195A (en) * | 2002-05-13 | 2003-11-18 | Kanzaki Kokyukoki Mfg Co Ltd | Vertical centrifugal separator |
| JP2011515209A (en) * | 2008-03-20 | 2011-05-19 | ジーイーエー ウエストファリア セパレーター ゲーエムベーハー | Gear device for centrifuge |
| US8808154B2 (en) * | 2010-09-13 | 2014-08-19 | Hiller Gmbh | Drive apparatus in a scroll centrifuge having a gearbox with a housing nonrotatably connected to a drive shaft |
| CN107575551A (en) * | 2017-10-19 | 2018-01-12 | 章臣重工(苏州)有限公司 | A kind of centrifuge differential mechanism with central through hole |
| CN114749285A (en) * | 2022-05-12 | 2022-07-15 | 南京莫尼亚离心机科技发展有限公司 | Horizontal centrifugal separator for ultra-micro floating particles |
-
1995
- 1995-04-18 JP JP11799795A patent/JP2847044B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003326195A (en) * | 2002-05-13 | 2003-11-18 | Kanzaki Kokyukoki Mfg Co Ltd | Vertical centrifugal separator |
| JP2011515209A (en) * | 2008-03-20 | 2011-05-19 | ジーイーエー ウエストファリア セパレーター ゲーエムベーハー | Gear device for centrifuge |
| US8808154B2 (en) * | 2010-09-13 | 2014-08-19 | Hiller Gmbh | Drive apparatus in a scroll centrifuge having a gearbox with a housing nonrotatably connected to a drive shaft |
| CN107575551A (en) * | 2017-10-19 | 2018-01-12 | 章臣重工(苏州)有限公司 | A kind of centrifuge differential mechanism with central through hole |
| CN114749285A (en) * | 2022-05-12 | 2022-07-15 | 南京莫尼亚离心机科技发展有限公司 | Horizontal centrifugal separator for ultra-micro floating particles |
| CN114749285B (en) * | 2022-05-12 | 2023-09-12 | 南京莫尼亚离心机科技发展有限公司 | Super-tiny floating particle horizontal centrifugal separator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2847044B2 (en) | 1999-01-13 |
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