WO2010029623A1 - エレベータ用巻上機 - Google Patents
エレベータ用巻上機 Download PDFInfo
- Publication number
- WO2010029623A1 WO2010029623A1 PCT/JP2008/066409 JP2008066409W WO2010029623A1 WO 2010029623 A1 WO2010029623 A1 WO 2010029623A1 JP 2008066409 W JP2008066409 W JP 2008066409W WO 2010029623 A1 WO2010029623 A1 WO 2010029623A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat
- rotating body
- fixed frame
- hoisting machine
- cooling
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
- B66B11/0438—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation with a gearless driving, e.g. integrated sheave, drum or winch in the stator or rotor of the cage motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/08—Driving gear ; Details thereof, e.g. seals with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/227—Heat sinks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/1004—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys
- H02K7/1008—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys structurally associated with the machine rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/225—Heat pipes
Definitions
- This invention relates to an elevator hoisting machine cooling structure having a brake mounted therein.
- a conventional hoisting machine has a stator provided in a housing, which is a fixed frame body having a closed structure, and is installed in the housing, and a field magnet is arranged facing the stator, and a driving sheave is provided on one side. And a brake disposed on the inner surface side of the rotor. Further, a stationary side heat pipe provided through the side surface facing the stator of the housing and a rotating side heat pipe provided through the side surface facing the housing side of the rotor are provided. The heat in the housing is radiated to the outside by the stationary heat pipe, and the heat in the rotor is radiated to the outside by the rotation side heat pipe. (See Patent Document 1)
- the conventional permanent magnet rotary electric motor includes a stator attached to a fixed frame and a rotor in which a field magnet is disposed facing the stator.
- the cooling fin is provided in the internal peripheral surface of a rotor, or the heat pipe is provided in the circumferential direction of the rotor. Then, the cooling fins are rotated by the rotation of the rotor, so that the cooling air is agitated and the heat generated from the stator is dissipated. Heat is also radiated by the heat pipe of the rotor.
- another conventional permanent magnet rotary electric motor includes a stator provided in a fixed frame body, a shaft rotatably supported by the fixed frame body, and a shaft mounted on the shaft so as to face the stator. And a rotor on which magnets are arranged. Further, a heat pipe is provided inside the shaft, and one end of the heat pipe protrudes outside the rotary electric motor, and a cooling fin is provided at the protruding portion. And an electric blower is provided facing the cooling fin, and the fixed fin and the cooling fin of the heat pipe are cooled by this electric blower. Thereby, the rotary electric motor is cooled. (See Patent Document 3)
- JP 2002-101615 (page 2-3, FIG. 2) JP-A-8-298736 (page 3, FIGS. 1 and 2) JP 2001-8411 A
- Patent Document 1 the heat pipes are provided on both the stationary side and the rotating side, the number of parts is large, and the cooling is performed by natural air cooling. There was a problem that the cooling performance was lower. Moreover, although the thing of patent document 2 is radiating the heat
- a rotating body is rotatably supported via a bearing on a main shaft erected at the center of the fixed frame, and a stator provided on the fixed frame,
- An electric motor is constituted by a field magnet provided on the rotating body and arranged to face the stator.
- a heat pipe is provided inside the main shaft, and a part of the heat pipe protrudes outside the main shaft, and a heat radiating fin is provided at the protruding portion.
- the cooling fin is arrange
- the heat generated from the hoisting machine is guided to the heat radiating fins via the heat pipe, and the cooling air is generated by the rotation of the cooling fins by the rotation of the rotating body.
- the upper machine is cooled. Therefore, it is not necessary to separately provide a blower for cooling the heat generation, and the heat generation of the hoisting machine can be efficiently cooled with a small configuration.
- FIG. 3 is a view showing a cross section BB in FIG. 2.
- FIG. 5 is an enlarged view showing a part of the cooling fin 20 and is a view for explaining a mode in which cooling air is generated.
- FIG. 5 is an enlarged view showing a part of the cooling fin 20 and is a view for explaining a mode in which cooling air is generated.
- FIG. 9 is a view showing a cross section CC of FIG.
- FIG. 1 is a front view of a hoist according to Embodiment 1 for carrying out the present invention.
- FIG. 2 is a view showing a cross section AA of FIG.
- the hoisting machine includes a fixed frame 1, a rotating body 2, a driving sheave 3, and a brake 4 that brakes the rotation of the rotating body 2.
- the fixed frame 1 has a bowl shape with one side open, and a main shaft 5 is erected at the center.
- the rotating body 2 has a bowl shape with one side opened, and the opening end face 2 a faces the bottom surface of the fixed frame body 1 and is arranged inside the fixed frame body 1.
- the rotating body 2 is rotatably supported on the main shaft 5 via a bearing 6.
- a stator 7 is attached to the inner peripheral surface of the fixed frame 1.
- a field magnet 8 is disposed opposite to the stator 7 and attached to the outer periphery of the rotating body 2.
- the stator 7 and the field magnet 8 constitute an electric motor.
- the brake 4 is disposed on the inner peripheral side of the rotating body 2 and attached to the fixed frame 1.
- the brake 4 performs braking and braking release by advancing and retracting the braking piece 4a with respect to the braking surface 2b by an electromagnet and a push spring (not shown).
- Two brakes 4 are arranged on both sides with respect to the rotation center of the rotating body 2.
- a plurality of heat pipes 9 are inserted inside the main shaft 5, and a part protrudes outside the main shaft 5.
- a portion where the heat pipe 9 is inserted into the main shaft 5 is a heat receiving portion 9a, and a portion protruding outside the main shaft 5 is a heat radiating portion 9b.
- a plurality of disc-shaped heat radiation fins 10 are arranged and attached to the heat radiation portion 9b in the axial direction.
- the driving sheave 3 is integrally provided on one side surface of the rotating body 2 opposite to the fixed frame 1.
- the cooling fin 11 is arrange
- the cooling fin 11 is composed of a plurality of flat plates 11a, and the flat plates 11a are arranged radially from the center of rotation in the radial direction with intervals in the rotation direction.
- a protective cover 12 is attached to the opening edge of the fixed frame 1.
- the protective cover 12 has a plate shape, the side surface covers the stator 7, and the inner peripheral surface has a gap with the rotating body 2.
- the operation of the hoisting machine will be described.
- the operation of driving the hoisting machine will be described.
- the stator 7 is energized and the field magnet 8 is magnetized, the rotating body 2 rotates.
- the electromagnet of the brake 4 is energized to generate an electromagnetic force against the pressing force of the pressing spring, and the braking piece 4a is detached from the braking surface 2b to release the braking.
- the hoisting machine stops the energization of the stator 7 is cut off and the driving of the electric motor is stopped.
- the electromagnet of the brake 4 is also de-energized to release the electromagnetic force, and the brake piece 4a presses the braking surface 2b by the push spring, and the rotating body 2 is braked.
- Heat generated by the stator 7 and the brake 4 is thermally conducted from the mounting surface of the fixed frame 1, and heat propagates to the main shaft 5. Further, heat generated from the bearing 6 is also thermally conducted to the main shaft 5 of the fixed frame 1.
- the heat guided to the main shaft 5 in this way is guided from the heat receiving portion 9 a of the heat pipe 9 to the heat radiating portion 9 b and conducted to the heat radiating fins 10.
- the cooling fin 11 rotates with rotation of the rotary body 2, a cooling wind generate
- Cooling air generated by the rotation of the cooling fins 11 is generated as follows. As the cooling fin 11 rotates, the air in the space of the flat plate 11a adjacent to the rotation direction also tries to rotate. This air is rotated so that centrifugal force acts to flow in the radial direction. As a result, the cooling fins 11 extrude the air in the space between the adjacent flat plates 11a, and the cooling air is generated by the airflow flowing in the radial direction from the heat radiation fins 10 as indicated by the arrow X in the figure. And the heat
- a rotating body 2 is rotatably supported by a main shaft 5 erected at the center of a fixed frame body 1 via a bearing 6, and is provided on the fixed frame body 1.
- An electric motor is configured by the stator 7 and the field magnet 8 provided on the rotating body 2 and arranged to face the stator 7.
- the heat pipe 9 is provided inside the main shaft 5, and a part of the heat pipe 9 protrudes outside the main shaft 5.
- the heat radiating fin 10 is provided on the protruding portion, and the cooling fin 11 is disposed around the heat radiating fin 10.
- the rotating body 2 is provided.
- the heat generated from the hoisting machine is guided to the heat radiating fin 10 through the heat pipe 9, and cooling air is generated by the rotation of the cooling fin 11, and this cooling air radiates heat from the heat radiating fin 10,
- the machine is cooled. Therefore, it is not necessary to separately provide a blower for cooling the heat generation, and the heat generation of the hoisting machine can be efficiently cooled with a small configuration.
- the cooling fin 11 since the cooling fin 11 itself is also rotated to be cooled, the heat guided to the rotating body 2 is also radiated and further efficiently cooled. Further, the cooling fin 11 is composed of a plurality of flat plates 11a, and the flat plates 11a are arranged radially from the center of rotation at intervals in the rotation direction, so that the heat generation of the hoisting machine has a simple structure. Can be cooled.
- FIG. FIG. 3 is a front view of the hoist according to Embodiment 2 for carrying out the present invention.
- FIG. 4 is a view showing a cross section BB of FIG.
- the hoisting machine in the second embodiment is obtained by changing the cooling fin provided in the rotating body 2 with respect to the first embodiment.
- Cooling fins 20 are disposed around the heat radiating fins 10 on the side surfaces of the drive sheave 3.
- the cooling fin 20 includes a plurality of arc-shaped plates 20a.
- the arc-shaped plate 20a has an arc shape that is concentric with the rotating body 2, and is disposed with a gap in the rotational direction and the radial direction.
- the arcuate plate 20 a is an arc corresponding to the same central angle at the rotation center of the rotating body 2. Further, the arc-shaped plates 20a adjacent to each other in the rotation direction are arranged on concentric circles. Other points are the same as those of the first embodiment, and detailed description thereof is omitted. Also, the same reference numerals as those in the first embodiment indicate corresponding parts.
- the heat generated in the hoisting machine is guided from the heat receiving portion 9a of the heat pipe 9 to the heat radiating portion 9b and conducted to the heat radiating fins 10 as in the first embodiment.
- the cooling fin 20 rotates with rotation of the rotary body 2, a cooling wind generate
- FIGS. 5 and 6 are enlarged views showing a part of the cooling fin 20, and are diagrams for explaining a mode in which cooling air is generated.
- fins 20a1, 20a2, and 20a3 that are adjacent to each other in the radial direction and fins 20b1, 20b2, 20b3, 20c1, 20c2, and 20c3 that are adjacent to each other in the rotation direction are arranged from a position close to the rotation center.
- the cooling fin 20 rotates, the air in the space between the cooling fins adjacent in the radial direction also tries to rotate. In particular, the air near the cooling fin tends to rotate.
- the air 21 of the fin 20a1 in the radial space between the fin 20a1 and the heat radiating fin 10 tries to rotate by the rotation of the fin 20a1.
- the air 21 is rotated, and thus centrifugal force acts, and the air 21 flows in the radial direction while rotating as indicated by an arrow in FIG.
- the air 21 since the air 21 has a space without being obstructed in the rotation direction, the air 21 tries to stay without rotating together with the fins 20a1. Then, when the fin 20a1 rotates and the radial space of the air 21 reaches the interval 22 in the rotational direction of the fin 20a1 and the fin 20b1, the air 21 has a diameter as shown in FIG. Flow in the direction. Then, the cooling fin 20 further rotates, and as shown in FIG. 6 (a), the air 21 is in the space of the cooling fin adjacent to the radial direction outside the first stage, that is, in the radial space of the fin 20b1 and the fin 20b2. to go into.
- the cooling fin 20 continues to rotate, as shown in FIG. 6B, the air 21 further flows into the radial space of the cooling fin 20 on the outside of the first stage, that is, the radial space between the fin 20c2 and the fin 20c3. Finally, it flows out of the hoist.
- the air in the space between the cooling fins adjacent in the radial direction similarly flows in the radial direction while rotating and flows out to the outside of the hoisting machine.
- cooling air is generated as an airflow flowing in the radial direction and the rotational direction from the radiation fin 10 as indicated by an arrow Y in FIG. And the heat
- the cooling fin 20 itself is also cooled by rotating.
- the hoisting machine according to the second embodiment of the present invention configured as described above has the same effects as those of the first embodiment and also has the following effects. Since the cooling fin 20 has a circular arc shape that is concentric with the rotating body 2, the air resistance when rotating is small. Therefore, the rotation loss of the electric motor is also reduced, heat generation is suppressed, and the cooling performance is further improved.
- the cooling fin 20 has an arc shape
- the cooling fin 20 may have a flat plate shape substantially tangential to the concentric circle of the rotating body 2. Even in this embodiment, the air loss is smaller than that in the arc shape, but the rotation loss is smaller than that in the first embodiment.
- the cooling fin 20 was made into the circular arc corresponding to the same central angle in the rotation center of the rotary body 2, it may not be the length of the circular arc corresponding to the same central angle. It suffices that the arc-shaped plates are arranged with a gap in the radial direction and the rotational direction.
- the cooling fin 20 has an arc shape corresponding to the same central angle.
- FIG. FIG. 7 is a front view of a hoisting machine according to Embodiment 3 for carrying out the present invention.
- the hoisting machine in the third embodiment is obtained by changing the cooling fin provided in the rotating body 2 with respect to the second embodiment.
- Cooling fins 25 are disposed around the heat radiating fins 10 on the side surfaces of the drive sheave 3.
- the cooling fin 25 is composed of a plurality of arc-shaped plates 25a.
- the arc-shaped plate 25a has an arc shape that is concentric with the rotating body 2, and is disposed with a gap in the rotational direction and the radial direction.
- the arc-shaped plate 25 a is an arc corresponding to the same central angle at the rotation center of the rotating body 2.
- the arc-shaped plates 25a adjacent to each other in the rotation direction are arranged on circles having different radii with the rotation center as the center.
- the other points are the same as in the second embodiment, and detailed description thereof is omitted.
- the same reference numerals as those in the second embodiment indicate the corresponding parts.
- the arc-shaped plate 25a of the cooling fin 25 has a circular shape that is concentric with the rotating body 2, and is disposed with a gap in the rotational direction and the radial direction.
- the cooling fins 25 rotate with the rotation of the rotating body 2 to generate cooling air.
- the heat of the radiating fins 10 is dissipated by the cooling air, and the heat generated by the hoisting machine is cooled.
- the cooling fin 25 is an arc-shaped plate concentric with the rotating body 2, and therefore the air resistance when rotating is small.
- FIG. FIG. 8 is a view showing a longitudinal section of a side surface of the hoist according to the fourth embodiment for carrying out the present invention.
- FIG. 9 is a view showing a cross section CC of FIG.
- the hoisting machine in the fourth embodiment is different from the first embodiment in the state of cooling.
- the fixed frame 30 has a bowl shape with an opening on one side, and a central portion 5 is formed with a hollow space 30a that is recessed in a cylindrical shape.
- the fixed frame 30 is provided with a plurality of ventilation holes 31. The ventilation holes 31 penetrate radially inward from the space 30a to the inside of the fixed frame 30.
- a plurality of heat pipes 32 are inserted inside the main shaft 5, and a part of the heat pipes 32 protrudes into the space 30 a outside the main shaft 5.
- a portion where the heat pipe 32 is inserted into the main shaft 5 is a heat receiving portion 32a, and a portion protruding to the space portion 30a is a heat radiating portion 32b.
- a plurality of disk-shaped heat radiating fins 33 are axially arranged and attached to the heat radiating portion 32b.
- the ventilation holes 31 are disposed around the heat radiating fins 33.
- Cooling fins 34 are provided on the opening end surface 2 a of the rotating body 2.
- the cooling fin 34 is disposed on the radial extension of the ventilation hole 31.
- the cooling fins 34 are composed of a plurality of flat plates, and are arranged radially from the center of rotation in the radial direction with intervals in the direction of rotation.
- the heat generated by the hoisting machine is guided from the heat receiving part 32 a of the heat pipe 32 to the heat radiating part 32 b and conducted to the heat radiating fins 33 as in the first embodiment.
- the cooling fin 34 rotates with rotation of the rotary body 2, and cooling air generate
- fever of the radiation fin 33 is thermally radiated by this cooling air.
- the cooling air as in the first embodiment, the air in the space between the cooling fins adjacent in the rotation direction flows in the radial direction by the action of centrifugal force.
- the cooling air is generated as an airflow flowing in the radial direction from the heat radiation fins 33 through the ventilation holes 31 as indicated by Z in the figure.
- the airflow hits the inner peripheral surface of the fixed frame 30 and flows out through the gap 35 between the stator 7 and the field magnet 8.
- the heat of the radiating fin 33 enters the inside of the fixed frame 30 through the ventilation hole 31 along with the airflow of the cooling air, and radiates heat from the gap 35 between the stator 7 and the field magnet 8 to the outside of the hoisting machine. Is done.
- heat radiated inward from the brake 4 and the fixed frame 30, heat radiated inward from the stator 7, etc. are also wound along with this cooling air. Heat is released to the outside of the machine.
- the hoisting machine according to the fourth embodiment of the present invention has the same effect as that of the first embodiment.
- the central portion of the fixed frame 30 is formed with a hollow space 30a that is recessed inwardly in a cylindrical shape, and a plurality of ventilation holes 31 that are radially pierced radially inward from the space portion 30a are provided.
- a cooling fin 34 is arranged on the radial extension of 31.
- the elevator hoisting machine according to the present invention is suitable for use as a drive device that raises and lowers an elevator car and stops the car on the landing floor.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
また、他の従来の永久磁石回転形電動機は、固定枠体内に設けられたステータと、固定枠体に回転可能に支持された軸と、この軸に装備されて、ステータに対向して界磁磁石が配置されたロータとを備えている。また、軸の内部にヒートパイプが設けられ、このヒートパイプの一端を回転電動機の外部に突出させ、この突出部分に冷却フィンが具備されている。そして、冷却フィンに対向して電動送風機が設けられ、この電動送風機により、固定枠体とヒートパイプの冷却フィンを冷却している。これにより、回転電動機を冷却している。(特許文献3参照)
また、特許文献2のものは、ステータから発生する熱を、ロータに設けられた冷却フィンやヒートパイプを介して放熱しているが、ステータが取り付けられた固定枠体自身を冷却するものはないので、冷却性が低いといった問題があった。
また、特許文献3のものは、ヒートパイプの冷却フィンを電動送風機で強制的に冷却しているが、電動送風機を設けなければならず、構成部品が多くなるといった問題があった。
この発明は、かかる問題点を解決するためになされたもので、少ない構成で巻上機の発熱を効率よく冷却することを目的とする。
実施の形態1.
図1は、この発明を実施するための実施の形態1における巻上機の正面図である。図2は図1の断面A―Aを示した図である。
実施の形態1における巻上機は、固定枠体1の中心部に立設した主軸5に、回転体2が軸受6を介して回転可能に支持されており、固定枠体1に設けられたステータ7と、回転体2に設けられ、ステータ7と対向して配置された界磁磁石8とによって電動機が構成されている。そして、ヒートパイプ9が主軸5の内部に設けられて、一部が主軸5の外部に突出しており、この突出部に放熱フィン10が設けられ、冷却フィン11が放熱フィン10の周囲に配置されて回転体2に設けられている。これによって、巻上機から発生した熱がヒートピイプ9を介して放熱フィン10に導かれ、冷却フィン11の回転によって冷却風が発生し、この冷却風が放熱フィン10の熱を放熱し、巻上機が冷却される。そのため、発熱を冷却するための送風機を別個に設ける必要がなく、少ない構成で巻上機の発熱を効率よく冷却することができる。
また、冷却フィン11は複数の平板11aで構成され、この平板11aが回転方向に間隔をおいて回転中心から径方向へ放射状に配置されているので、いたって簡単な構造で巻上機の発熱を冷却することができる。
図3は、この発明を実施するための実施の形態2における巻上機の正面図である。図4は図3の断面B―Bを示した図である。
実施の形態2における巻上機は、実施の形態1に対して、回転体2に設けられた冷却フィンを変更したものである。
駆動綱車3の側面に冷却フィン20が放熱フィン10の周囲に配置されている。この冷却フィン20は複数の円弧状の板20aで構成され、円弧状の板20aは回転体2と同心円の円弧状を呈し、回転方向及び径方向に間隔を有して配置されている。そして、円弧状の板20aは、回転体2の回転中心における同一の中心角に対応した円弧となっている。また、回転方向にそれぞれ隣合う円弧状の板20aは、同心円上に配置されている。その他の点は実施の形態1と同様であり、詳細な説明は省略する。また、実施の形態1と同符号のものは相当部分を示す。
巻上機に発生した熱は、実施の形態1と同様に、ヒートパイプ9の受熱部9aから放熱部9bへ導かれ、放熱フィン10へ熱伝導する。そして、回転体2の回転とともに冷却フィン20が回転することで冷却風が発生し、この冷却風によって、放熱フィン10の熱が巻上機の外側へ放熱される。
図5、6は、冷却フィン20の一部分を示した拡大図で、冷却風が発生する態様を説明する図である。図において、回転中心から近い位置から、径方向に隣合うフィン20a1、20a2、20a3と、これらと回転方向に隣合うフィン20b1、20b2、20b3、20c1、20c2、20c3とが配置されている。冷却フィン20が回転することで、径方向に隣合う冷却フィンの空間の空気も回転しようとする。特に、冷却フィンの近傍の空気が回転しようとする。例えば、フィン20a1と放熱フィン10との径方向の空間におけるフィン20a1の空気21が、フィン20a1の回転によって回転しようとする。このとき、この空気21は、回転することで遠心力が作用し、図5(a)の矢印のように回転しながら径方向へ流れるようとする。
冷却フィン20は、回転体2と同心円の円弧状を呈しているので、回転するときの空気抵抗が小さくてすむ。そのため、電動機の回転ロスも小さくなり、発熱が抑制され、冷却性がさらに向上する。
また、冷却フィン20は、回転体2の回転中心における同一の中心角に対応した円弧としたが、同一の中心角に対応した円弧の長さでなくてもよい。円弧状の板が径方向及び回転方向に間隔を有して配置されていればよい。但し、同一の中心角に対応した円弧であれば、それぞれ径方向に隣合う冷却フィンの空間の空気が、同じタイミングで回転方向に隣合うフィンの間隔に差し掛かるので、同じタイミングで外側へと流れ出る。そのため、冷却風の乱流が抑制された状態で放熱できる。また、冷却フィンの放熱面積も大きくできるので、冷却フィン20を同一の中心角に対応した円弧状とした形態が好ましい。
図7は、この発明を実施するための実施の形態3における巻上機の正面図である。
実施の形態3における巻上機は、実施の形態2に対して、回転体2に設けられた冷却フィンを変更したものである。
図8は、この発明を実施するための実施の形態4における巻上機の側面の縦断面を示した図である。図9は図8の断面C-Cを示した図である。
実施の形態4における巻上機は、実施の形態1に対して、冷却の状態が異なるものである。
固定枠体30は一側が開口した椀状を呈し、中心部が内側へ円筒状に凹んだ空間部30aを形成し、中心部に主軸5が空間部30aの反対側へ立設している。また、固定枠体30には複数の通風穴31が設けられている。この通風穴31は、空間部30aから径方向へ放射状に固定枠体30の内側へ貫通している。
Claims (5)
- 固定枠体と、
該固定枠体の中心部に立設した主軸と、
該主軸に軸受を介して回転可能に支持された回転体と、
前記固定枠体に設けられたステータと、
前記回転体に設けられ前記ステータと対向して配置されて前記ステータとによって電動機を構成する界磁磁石と、
前記主軸の内部に設けられ一部が前記主軸の外部に突出したヒートパイプと、
該ヒートパイプの突出部に設けられた放熱フィンと、
前記放熱フィンの周囲に配置されて前記回転体に設けられた冷却フィンと、
を備えたことを特徴とするエレベータ用巻上機。 - 前記冷却フィンは、複数の平板で構成され、該平板が、回転方向に間隔をおいて、前記回転体の回転中心から径方向へ放射状に配置されていることを特徴とする請求項1に記載のエレベータ用巻上機。
- 前記冷却フィンは、複数の円弧状若しくは平板状の板で構成され、該板が、前記回転体と同心円の略円弧状、若しくは同心円に対してほぼ接線上の平板状を呈し、回転方向及び径方向に間隔を有して配置ことを特徴とする請求項1に記載のエレベータ用巻上機。
- 前記冷却フィンの前記板は、前記回転体の回転中心における同一の中心角に対応した円弧状の板であることを特徴とする請求項3に記載のエレベータ用巻上機。
- 前記固定枠体は中心部が内側へ円筒状に凹んだ空間部を形成し、前記ヒートパイプは前記空間部に突出されて、この突出部に設けられた放熱フィンと、
前記固定枠体に設けられ、前記空間部から径方向内側へ放射状に貫通し、前記放熱フィンの周囲に配置された通風穴と、
前記回転体に設けられ、前記通風穴の径方向の延長上に配置された冷却フィンと、
を備えたことを特徴とする請求項1に記載のエレベータ用巻上機。
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PCT/JP2008/066409 WO2010029623A1 (ja) | 2008-09-11 | 2008-09-11 | エレベータ用巻上機 |
EP08810461.7A EP2325983B1 (en) | 2008-09-11 | 2008-09-11 | Hoist for elevator |
KR1020117005648A KR101219236B1 (ko) | 2008-09-11 | 2008-09-11 | 엘리베이터용 권상기 |
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JP2012076897A (ja) * | 2010-10-04 | 2012-04-19 | Mitsubishi Electric Corp | エレベータ用巻上機 |
JP2012140193A (ja) * | 2010-12-28 | 2012-07-26 | Mitsubishi Electric Corp | エレベータの巻上機 |
JP2013009461A (ja) * | 2011-06-22 | 2013-01-10 | Hitachi Ltd | エレベータ装置用巻上機 |
JP2013043757A (ja) * | 2011-08-25 | 2013-03-04 | Hitachi Ltd | エレベータ装置用巻上機の制御装置、制御方法及び制御装置の改修方法 |
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KR20110044895A (ko) | 2011-05-02 |
JP5177228B2 (ja) | 2013-04-03 |
JPWO2010029623A1 (ja) | 2012-02-02 |
CN102150348A (zh) | 2011-08-10 |
CN102150348B (zh) | 2013-09-25 |
EP2325983B1 (en) | 2017-05-10 |
EP2325983A4 (en) | 2014-10-15 |
KR101219236B1 (ko) | 2013-01-09 |
EP2325983A1 (en) | 2011-05-25 |
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