JP6619254B2 - Bearing cooling structure - Google Patents

Bearing cooling structure Download PDF

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JP6619254B2
JP6619254B2 JP2016024532A JP2016024532A JP6619254B2 JP 6619254 B2 JP6619254 B2 JP 6619254B2 JP 2016024532 A JP2016024532 A JP 2016024532A JP 2016024532 A JP2016024532 A JP 2016024532A JP 6619254 B2 JP6619254 B2 JP 6619254B2
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bearing
cooling
housing
cooling passage
rotating shaft
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JP2017141924A (en
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潤一郎 池田
潤一郎 池田
悟 吉之元
悟 吉之元
和彦 石田
和彦 石田
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Sasakura Engineering Co Ltd
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Sasakura Engineering Co Ltd
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Priority to JP2016024532A priority Critical patent/JP6619254B2/en
Priority to KR1020160106863A priority patent/KR20170095113A/en
Priority to CN201611027483.XA priority patent/CN107084203B/en
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    • 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
    • F16C37/00—Cooling of bearings
    • F16C37/007—Cooling of bearings of rolling bearings
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/32—Balls
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)

Description

本発明は、軸受冷却構造に関する。
The present invention relates to a bearing cooling structure.

ハウジングの内部に軸受を介して回転軸が支持された軸受装置は、例えば、ポンプ、ブロワ、コンプレッサ、アクチュエータ等、種々の用途に使用されている。このような軸受装置においては、回転軸が高速回転すると、軸受が高温になって熱変形を生じるおそれがあることから、軸受を冷却することが従来から検討されている。   A bearing device in which a rotating shaft is supported inside a housing via a bearing is used in various applications such as a pump, a blower, a compressor, and an actuator. In such a bearing device, if the rotating shaft rotates at a high speed, the bearing may become hot and may be thermally deformed. Therefore, it has been conventionally studied to cool the bearing.

例えば、特許文献１には、潤滑油が封入された軸受箱の内部に、回転リングを備える回転軸が軸受を介して支持された軸受装置において、潤滑油を冷却する冷却器を備え、回転軸の回転により回転リングが掻き上げた潤滑油が軸受に供給される構成が開示されている。   For example, Patent Document 1 includes a cooler that cools lubricating oil in a bearing device in which a rotating shaft including a rotating ring is supported via a bearing inside a bearing box in which lubricating oil is sealed. A configuration is disclosed in which lubricating oil scraped up by the rotating ring is supplied to the bearing.

また、特許文献２には、軸受を介してボールねじを支持するハウジングに、冷却媒体が通過する冷却用貫通孔を軸方向に沿って形成し、この冷却用貫通孔をハウジングの周方向に沿って均等に複数配置した構成が開示されている。   In Patent Document 2, a cooling through-hole through which a cooling medium passes is formed along the axial direction in a housing that supports a ball screw via a bearing, and the cooling through-hole is formed along the circumferential direction of the housing. In other words, a configuration in which a plurality of components are equally arranged is disclosed.

特公平６−３７８９８号公報Japanese Patent Publication No. 6-37898 特開２０１４−７４４７９号公報JP 2014-74479 A

ところが、上記特許文献１に開示された構成は、軸受に対して潤滑油を均一に供給することが困難であるため、高速回転等で軸受が発熱した場合に、軸受の温度分布が周方向で不均一になっていた。   However, since the configuration disclosed in Patent Document 1 is difficult to uniformly supply lubricating oil to the bearing, when the bearing generates heat during high-speed rotation or the like, the temperature distribution of the bearing is circumferential. It was uneven.

また、特許文献２に開示された構成は、複数の冷却用貫通孔が、軸受の周方向に間隔をあけて配置されるため、軸受を周方向にみた場合に、冷却用貫通孔が配置された部分と配置されていない部分とで冷却能力が相違することから、やはり周方向の温度分布が大きくなっていた。   Further, in the configuration disclosed in Patent Document 2, since a plurality of cooling through holes are arranged at intervals in the circumferential direction of the bearing, the cooling through holes are arranged when the bearing is viewed in the circumferential direction. Since the cooling capacity is different between the part that is not arranged and the part that is not arranged, the temperature distribution in the circumferential direction is still large.

このように、従来の冷却構造では、軸受に周方向の温度分布が生じることで熱変形が周方向で不均一になり易いことから、回転軸との隙間が不均一になって回転時の振動増加を招くと共に、これによって軸受の更なる発熱が生じ易くなるため、回転軸の高速回転が困難であるという問題があった。   As described above, in the conventional cooling structure, since the temperature distribution in the circumferential direction is generated in the bearing, thermal deformation tends to be non-uniform in the circumferential direction. In addition to incurring an increase, this makes it easier for the bearings to generate more heat, which makes it difficult to rotate the rotating shaft at a high speed.

そこで、本発明は、軸受を周方向に均一に冷却することにより、回転軸の高速回転を安定して維持することができる軸受冷却構造の提供を目的とする。
Accordingly, the present invention is to uniformly cool the bearing in the circumferential direction, and an object thereof is to provide a bearing cooling structure capable of stably maintaining a high-speed rotation of the rotary shaft.

本発明の前記目的は、ハウジングと、前記ハウジング内に挿通された回転軸と、前記ハウジングおよび前記回転軸間に介在されたリング状の軸受とを備える軸受装置の前記軸受を冷却する構造であって、前記ハウジングの内部に冷却用通路が形成され、前記冷却用通路には、気体供給手段により冷却用気体を供給可能であり、前記冷却用通路は、前記軸受の外周を囲繞するように周方向全体にわたって形成されており、前記冷却用通路は、前記ハウジングの最下部のみに形成された導入口、および、前記ハウジングの最上部のみに形成された排出口を介して外部と連通しており、前記導入口から導入された冷却用気体が二方向への分流後に合流して前記排出口から排出され、前記ハウジングは、外筒と、前記外筒の両端部に嵌合されたリング状の一対の軸受ホルダとを備え、前記軸受は、前記軸受ホルダの内周面に保持されており、前記冷却用流路は、前記軸受ホルダの外周面に形成されている軸受冷却構造により達成される。
The object of the present invention is a structure for cooling the bearing of a bearing device including a housing, a rotating shaft inserted into the housing, and a ring-shaped bearing interposed between the housing and the rotating shaft. A cooling passage is formed in the housing, and a cooling gas can be supplied to the cooling passage by a gas supply means. The cooling passage surrounds the outer periphery of the bearing. The cooling passage is communicated with the outside through an inlet formed only in the lowermost part of the housing and an outlet formed only in the uppermost part of the housing. the cooling gas introduced from the introduction port joins after diversion of the two directions is discharged from the discharge port, wherein the housing and the outer cylinder, fitted at both ends of the outer cylinder engaged a ring And a pair of bearing holder, said bearing, said being held on the inner peripheral surface of the bearing holder, the cooling flow path is achieved by a bearing cooling structure which is formed on an outer peripheral surface of the bearing holder The

この軸受冷却構造において、前記冷却用通路は、前記軸受側の内周面に、周方向に沿って延びる冷却フィンが形成されていることが好ましい。   In this bearing cooling structure, it is preferable that the cooling passage is formed with cooling fins extending along a circumferential direction on an inner peripheral surface on the bearing side.

また、本発明の前記目的は、ハウジングと、前記ハウジング内に挿通された回転軸と、前記ハウジングおよび前記回転軸間に介在されたリング状の軸受とを備える軸受装置の前記軸受を冷却する構造であって、前記ハウジングの内部に冷却用通路が形成され、前記冷却用通路には、気体供給手段により冷却用気体を供給可能であり、前記冷却用通路は、前記軸受の外周を囲繞するように周方向全体にわたって形成されており、前記冷却用通路は、前記ハウジングの最下部のみに形成された導入口、および、前記ハウジングの最上部のみに形成された排出口を介して外部と連通しており、前記導入口から導入された冷却用気体が二方向への分流後に合流して前記排出口から排出され、前記気体供給手段は、前記排出口に取り付けられたファンを備え、前記ファンの作動により前記導入口から前記冷却用通路に外気が導入され、前記軸受装置は、蒸発濃縮装置のヒートポンプ装置に組み込まれており、前記ヒートポンプ装置の作動に連動して前記ファンが作動する軸受冷却構造により達成される。
In addition, the object of the present invention is a structure for cooling the bearing of a bearing device comprising a housing, a rotating shaft inserted into the housing, and a ring-shaped bearing interposed between the housing and the rotating shaft. A cooling passage is formed in the housing, and a cooling gas can be supplied to the cooling passage by a gas supply means, and the cooling passage surrounds an outer periphery of the bearing. The cooling passage communicates with the outside through an inlet port formed only in the lowermost portion of the housing and a discharge port formed only in the uppermost portion of the housing. And the cooling gas introduced from the inlet is merged after being diverted in two directions and discharged from the outlet, and the gas supply means includes a fan attached to the outlet. The outside air is introduced into the cooling passage from the inlet through the operation of the fan, and the bearing device is incorporated in the heat pump device of the evaporation concentrator, and the fan is operated in conjunction with the operation of the heat pump device. This is achieved by the operating bearing cooling structure.

本発明によれば、軸受を周方向に均一に冷却することにより、回転軸の高速回転を安定して維持することができる軸受冷却構造を提供することができる。
According to the present invention, by uniformly cooling the bearing in the circumferential direction, it is possible to provide a bearing cooling structure capable of stably maintaining a high-speed rotation of the rotary shaft.

本発明の一実施形態に係る軸受冷却構造を備える軸受装置の断面図である。It is sectional drawing of a bearing apparatus provided with the bearing cooling structure which concerns on one Embodiment of this invention. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 本発明の他の実施形態に係る軸受冷却構造を備える軸受装置の要部断面図である。It is principal part sectional drawing of a bearing apparatus provided with the bearing cooling structure which concerns on other embodiment of this invention.

以下、本発明の一実施形態について添付図面を参照して説明する。図１は、本発明の一実施形態に係る軸受冷却構造を備える軸受装置の断面図であり、図２は、図１のＡ−Ａ断面図である。図１および図２に示すように、軸受装置１は、筒状に形成されたハウジング１０の内部に回転軸２０が挿通されており、ハウジング１０と回転軸２０との間に介在された一対のリング状の軸受３０ａ，３０ｂにより、回転軸２０が回転自在に支持されている。ハウジング１０は、台板２に取り付けられた複数の支持部材３により支持されている。軸受３０ａ，３０ｂは、例えば、アンギュラ玉軸受である。   Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a cross-sectional view of a bearing device including a bearing cooling structure according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. As shown in FIG. 1 and FIG. 2, the bearing device 1 includes a pair of shafts having a rotating shaft 20 inserted through a housing 10 formed in a cylindrical shape and interposed between the housing 10 and the rotating shaft 20. The rotary shaft 20 is rotatably supported by ring-shaped bearings 30a and 30b. The housing 10 is supported by a plurality of support members 3 attached to the base plate 2. The bearings 30a and 30b are, for example, angular ball bearings.

ハウジング１０は、外筒１１と、外筒１１の両端部に嵌合されたリング状の一対の軸受ホルダ１２ａ，１２ｂとを備えており、軸受ホルダ１２ａ，１２ｂの内周面には、軸受３０ａ，３０ｂの外輪が保持部材１３ａ，１３ｂにより保持されている。軸受ホルダ１２ａ，１２ｂは、例えば、熱伝導性が良好で高強度の金属材料により形成することができる。軸受３０ａ，３０ｂの近傍には、従来の軸受装置と同様にオイルノズル（図示せず）を配置して、軸受３０ａ，３０ｂに対して冷却用のオイルを間欠噴霧するように構成してもよい。
The housing 10 includes an outer cylinder 11 and a pair of ring-shaped bearing holders 12a and 12b fitted to both ends of the outer cylinder 11 , and a bearing 30a is provided on the inner peripheral surface of the bearing holders 12a and 12b. , 30b are held by holding members 13a, 13b. The bearing holders 12a and 12b can be formed of, for example, a metal material having good thermal conductivity and high strength. In the vicinity of the bearings 30a and 30b, an oil nozzle (not shown) may be arranged in the same manner as the conventional bearing device so that cooling oil is intermittently sprayed onto the bearings 30a and 30b. .

軸受ホルダ１２ａ，１２ｂの外周面には、軸受３０ａ，３０ｂの外周を囲繞するように、溝状の冷却用流路４０ａ，４０ｂが周方向全体に形成されている。冷却用流路４０ａ，４０ｂの幅は、特に限定されないが、少なくとも軸受３０ａ，３０ｂの幅（軸方向の厚み）よりも大きいことが好ましく、リング状の冷却用流路４０ａ，４０ｂの内部に軸受３０ａ，３０ｂの全体が収まるように、冷却用流路４０ａ，４０ｂが配置されることが好ましい。冷却用流路４０ａ，４０ｂの深さは、軸受ホルダ１２ａ，１２ｂの強度を確保できる範囲で、なるべく深く（すなわち、残存する溝底を薄く）することが好ましい。   On the outer peripheral surfaces of the bearing holders 12a and 12b, groove-shaped cooling channels 40a and 40b are formed in the entire circumferential direction so as to surround the outer periphery of the bearings 30a and 30b. The width of the cooling channels 40a and 40b is not particularly limited, but is preferably at least larger than the width of the bearings 30a and 30b (thickness in the axial direction), and the bearings are provided inside the ring-shaped cooling channels 40a and 40b. It is preferable that the cooling flow paths 40a and 40b are arranged so that the entirety of 30a and 30b can be accommodated. The depth of the cooling channels 40a and 40b is preferably as deep as possible (that is, the remaining groove bottoms are made thin) as long as the strength of the bearing holders 12a and 12b can be secured.

冷却用流路４０ａ，４０ｂは、外筒１０の最下部に形成された導入口４１ａ，４１ｂと、外筒１０の最上部に形成された排出口４２ａ，４２ｂとにそれぞれ連通されている。排出口４２ａ，４２ｂには、ケーシングの上下に開口を有する気体供給手段としてのファン５０ａ，５０ｂが取り付けられており、ファン５０ａ，５０ｂの作動により、導入口４１ａ，４１ｂから冷却用流路４０ａ，４０ｂに外気が導入される。冷却用流路４０ａ，４０ｂの底面（すなわち、軸受３０ａ，３０ｂ側の内周面）には、周方向に沿って延びる冷却フィン４３ａ，４３ｂが、軸方向に間隔をあけて複数形成されている。   The cooling channels 40 a and 40 b communicate with inlets 41 a and 41 b formed at the lowermost part of the outer cylinder 10 and discharge ports 42 a and 42 b formed at the uppermost part of the outer cylinder 10, respectively. Fans 50a and 50b serving as gas supply means having openings at the top and bottom of the casing are attached to the discharge ports 42a and 42b. By the operation of the fans 50a and 50b, the cooling channels 40a and 40b are connected from the introduction ports 41a and 41b. Outside air is introduced into 40b. A plurality of cooling fins 43a and 43b extending along the circumferential direction are formed at intervals in the axial direction on the bottom surfaces of the cooling channels 40a and 40b (that is, the inner circumferential surfaces on the bearings 30a and 30b side). .

上記の構成を備える軸受装置１は、回転軸２０を不図示の駆動手段により回転駆動すると共に、ファン５０ａ，５０ｂを作動させることにより、図２に矢印で示すように、導入口４１ａから冷却用流路４０ａの下部に導入された冷却用の空気が左右二方向に分流した後、冷却用流路４０ａの上部で合流されて排出口４２ａから排出される。これにより、軸受３０ａは外周全体が均一に冷却されるので、回転軸２０の回転により軸受３０ａが発熱した場合でも、周方向に温度分布が生じるのを抑制することができる。この結果、回転軸２０の高速回転時における振動等の発生を抑制して、安定した運転状態を維持することができる。   In the bearing device 1 having the above-described configuration, the rotating shaft 20 is driven to rotate by a driving unit (not shown) and the fans 50a and 50b are operated, whereby cooling is performed from the inlet 41a as shown by arrows in FIG. After the cooling air introduced into the lower part of the flow path 40a is divided into two left and right directions, the air is merged at the upper part of the cooling flow path 40a and discharged from the discharge port 42a. Thereby, since the whole outer periphery of the bearing 30a is cooled uniformly, even when the bearing 30a generates heat due to the rotation of the rotating shaft 20, it is possible to suppress the temperature distribution in the circumferential direction. As a result, it is possible to suppress the occurrence of vibration or the like during the high-speed rotation of the rotary shaft 20 and maintain a stable operation state.

また、冷却用流路４０ａ，４０ｂの軸受３０ａ，３０ｂ側の内周面に、周方向に沿って延びる冷却フィン４３ａ，４３ｂを複数設けているので、冷却効率を高めることができると共に軸受ホルダ１２ａ，１２ｂを補強することができ、冷却用通路４０ａ，４０ｂの形成に伴うハウジング１０の強度低下を抑制することができる。   Further, since a plurality of cooling fins 43a and 43b extending along the circumferential direction are provided on the inner peripheral surfaces of the cooling flow paths 40a and 40b on the bearings 30a and 30b side, the cooling efficiency can be improved and the bearing holder 12a. , 12b can be reinforced, and the strength reduction of the housing 10 due to the formation of the cooling passages 40a, 40b can be suppressed.

以上、本発明の一実施形態について詳述したが、本発明の具体的な態様は上記実施形態に限定されない。例えば、図３に示すように、冷却用流路４０ａの内部に隔壁４４ａを設けて、隔壁４４ａを挟んで両側に導入口４１ａおよび排出口４２ａを配置することにより、導入口４１ａから冷却用流路４０ａに導入された冷却用の空気を、分流させることなく軸受３０ａの外周全体と熱交換させて、排出口４２ａから排出することができる。なお、図３において、図２と同様の構成部分には同一の符号を付している。   As mentioned above, although one Embodiment of this invention was explained in full detail, the specific aspect of this invention is not limited to the said embodiment. For example, as shown in FIG. 3, by providing a partition wall 44a inside the cooling flow path 40a and disposing the inlet port 41a and the outlet port 42a on both sides of the partition wall 44a, a cooling flow is introduced from the inlet port 41a. The cooling air introduced into the passage 40a can be discharged from the outlet 42a by exchanging heat with the entire outer periphery of the bearing 30a without being diverted. In FIG. 3, the same components as those in FIG. 2 are denoted by the same reference numerals.

また、本実施形態においては、冷却用流路４０ａ，４０ｂの排出口４２ａ，４２ｂにファン５０ａ，５０ｂを取り付けているが、冷却用流路４０ａ，４０ｂに冷却用気体を導入するための手段は特に限定されず、例えば、他の設備で使用する圧縮空気等の気体供給源を導入口４１に配管接続して、冷却用流路４０ａ，４０ｂに冷却用気体を供給してもよい。   In the present embodiment, the fans 50a and 50b are attached to the discharge ports 42a and 42b of the cooling channels 40a and 40b, but means for introducing the cooling gas into the cooling channels 40a and 40b is as follows. For example, a gas supply source such as compressed air used in other equipment may be connected to the inlet 41 to supply the cooling gas to the cooling channels 40a and 40b.

本発明の軸受冷却構造を備える軸受装置は、例えば、蒸発濃縮装置のヒートポンプ装置（蒸気圧縮装置）など、回転軸２０が高速回転する装置に好適に組み込むことができる。この場合、軸受装置が組み込まれる装置（例えば、ヒートポンプ装置等）の作動に連動してファン５０ａ，５０ｂを作動させることで、省電力化を図りつつ、回転軸２０の安定した回転を確実に得ることができる。   The bearing device having the bearing cooling structure of the present invention can be suitably incorporated in a device in which the rotating shaft 20 rotates at high speed, such as a heat pump device (vapor compression device) of an evaporation concentrator. In this case, by operating the fans 50a and 50b in conjunction with the operation of a device in which the bearing device is incorporated (for example, a heat pump device or the like), stable rotation of the rotary shaft 20 is reliably obtained while saving power. be able to.

１ 軸受装置
１０ ハウジング
２０ 回転軸
３０ａ，３０ｂ 軸受
４０ａ，４０ｂ 冷却用通路
４１ａ，４１ｂ 導入口
４２ａ，４２ｂ 排出口
４３ａ，４３ｂ 冷却フィン
５０ ファン（気体供給手段） DESCRIPTION OF SYMBOLS 1 Bearing apparatus 10 Housing 20 Rotating shaft 30a, 30b Bearing 40a, 40b Cooling channel | path 41a, 41b Inlet port 42a, 42b Outlet port 43a, 43b Cooling fin 50 Fan (gas supply means)

Claims (3)

ハウジングと、前記ハウジング内に挿通された回転軸と、前記ハウジングおよび前記回転軸間に介在されたリング状の軸受とを備える軸受装置の前記軸受を冷却する構造であって、
前記ハウジングの内部に冷却用通路が形成され、前記冷却用通路には、気体供給手段により冷却用気体を供給可能であり、
前記冷却用通路は、前記軸受の外周を囲繞するように周方向全体にわたって形成されており、
前記冷却用通路は、前記ハウジングの最下部のみに形成された導入口、および、前記ハウジングの最上部のみに形成された排出口を介して外部と連通しており、前記導入口から導入された冷却用気体が二方向への分流後に合流して前記排出口から排出され、
前記ハウジングは、外筒と、前記外筒の両端部に嵌合されたリング状の一対の軸受ホルダとを備え、
前記軸受は、前記軸受ホルダの内周面に保持されており、
前記冷却用流路は、前記軸受ホルダの外周面に形成されている軸受冷却構造。 A structure for cooling the bearing of a bearing device comprising a housing, a rotating shaft inserted into the housing, and a ring-shaped bearing interposed between the housing and the rotating shaft;
A cooling passage is formed inside the housing, and a cooling gas can be supplied to the cooling passage by gas supply means.
The cooling passage is formed over the entire circumferential direction so as to surround the outer periphery of the bearing,
The cooling passage communicates with the outside through an introduction port formed only at the lowermost part of the housing and an exhaust port formed only at the uppermost part of the housing, and is introduced from the introduction port. The cooling gas is merged after being diverted in two directions and discharged from the outlet ,
The housing includes an outer cylinder and a pair of ring-shaped bearing holders fitted to both ends of the outer cylinder,
The bearing is held on the inner peripheral surface of the bearing holder,
The cooling channel is a bearing cooling structure formed on an outer peripheral surface of the bearing holder . 前記冷却用通路は、前記軸受側の内周面に、周方向に沿って延びる冷却フィンが形成されている請求項１に記載の軸受冷却構造。   The bearing cooling structure according to claim 1, wherein the cooling passage is formed with cooling fins extending along a circumferential direction on an inner peripheral surface on the bearing side. ハウジングと、前記ハウジング内に挿通された回転軸と、前記ハウジングおよび前記回転軸間に介在されたリング状の軸受とを備える軸受装置の前記軸受を冷却する構造であって、
前記ハウジングの内部に冷却用通路が形成され、前記冷却用通路には、気体供給手段により冷却用気体を供給可能であり、
前記冷却用通路は、前記軸受の外周を囲繞するように周方向全体にわたって形成されており、
前記冷却用通路は、前記ハウジングの最下部のみに形成された導入口、および、前記ハウジングの最上部のみに形成された排出口を介して外部と連通しており、前記導入口から導入された冷却用気体が二方向への分流後に合流して前記排出口から排出され、
前記気体供給手段は、前記排出口に取り付けられたファンを備え、
前記ファンの作動により前記導入口から前記冷却用通路に外気が導入され、
前記軸受装置は、蒸発濃縮装置のヒートポンプ装置に組み込まれており、
前記ヒートポンプ装置の作動に連動して前記ファンが作動する軸受冷却構造。 A structure for cooling the bearing of a bearing device comprising a housing, a rotating shaft inserted into the housing, and a ring-shaped bearing interposed between the housing and the rotating shaft;
A cooling passage is formed inside the housing, and a cooling gas can be supplied to the cooling passage by gas supply means.
The cooling passage is formed over the entire circumferential direction so as to surround the outer periphery of the bearing,
The cooling passage communicates with the outside through an introduction port formed only at the lowermost part of the housing and an exhaust port formed only at the uppermost part of the housing, and is introduced from the introduction port. The cooling gas is merged after being diverted in two directions and discharged from the outlet,
The gas supply means includes a fan attached to the discharge port,
Outside air is introduced from the introduction port into the cooling passage by the operation of the fan,
The bearing device is incorporated in the heat pump device of the evaporation concentration device,
Bearing cooling structure the fan in conjunction is you operation to the operation of the heat pump device.
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