CN116963987A - Hoist and elevator - Google Patents
Hoist and elevator Download PDFInfo
- Publication number
- CN116963987A CN116963987A CN202180092584.8A CN202180092584A CN116963987A CN 116963987 A CN116963987 A CN 116963987A CN 202180092584 A CN202180092584 A CN 202180092584A CN 116963987 A CN116963987 A CN 116963987A
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- Prior art keywords
- main shaft
- rotor
- hoist
- stator
- central axis
- 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.)
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Links
- 238000004804 winding Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 description 19
- 238000001816 cooling Methods 0.000 description 17
- 238000009423 ventilation Methods 0.000 description 12
- 230000008878 coupling Effects 0.000 description 10
- 238000010168 coupling process Methods 0.000 description 10
- 238000005859 coupling reaction Methods 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
The present invention is provided with: an exhaust hole provided in the casing and exhausting air from one side of the casing where the stator is provided to the opposite side; and ribs which are convex ribs protruding toward the case on the inner surface of the rotating body and are provided so as to extend radially with respect to the center axis of the main shaft. The rotary body is provided with an intake hole that sucks air from the outer surface side to the inner surface side of the rotary body, and is provided at a position at a distance from the central axis of the main shaft that is smaller than the distance from the central axis of the main shaft to the exhaust hole.
Description
Technical Field
The present invention relates to a hoist and an elevator.
Background
In recent years, a hoist for an elevator has been miniaturized. When the hoist is miniaturized, the heat radiation area of the motor is reduced, while when the output is increased, the heat generation amount is increased, and therefore, there is a problem in stabilizing the motor performance. In contrast, conventionally, for example, as in patent document 1, a structure is disclosed in which a blower blade is provided on an end surface of a rotor, and wind in a rotation axis direction of the rotor is caused to flow between the rotor and a stator with rotation of the rotor, thereby exhibiting a cooling function.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open publication 2016-220370
Disclosure of Invention
Problems to be solved by the invention
However, since the hoisting machine rotates in the forward and reverse directions according to the lifting direction of the elevator, the motor described in patent document 1 changes the direction of the cooling air according to the rotation direction of the rotor. Therefore, there is a problem in that the cooling efficiency varies depending on the lifting direction of the elevator.
Accordingly, an object of the present invention is to provide a hoist in which cooling air of the same direction is fed into the hoist even when the lifting direction is different and the cooling effect is stable, and an elevator using the hoist.
Means for solving the problems
In order to solve the above problems and achieve the object of the present invention, a hoist according to the present invention includes a housing provided with an exhaust hole, a main shaft, a rotating body provided with an intake hole, a sheave, and ribs. The housing is provided with a stator. The spindle is supported by the housing. The rotor is supported by the main shaft, has a rotor disposed at a position facing the stator, and rotates relative to the housing by the stator and the rotor. The sheave is provided on an outer surface of the rotating body opposite to an inner surface, which is a surface of the rotating body on the housing side in the axial direction of the main shaft. The exhaust hole is arranged on the shell and exhausts air from one side of the shell where the stator is arranged to the opposite side. The rib is a convex rib provided on the inner surface of the rotor so as to protrude toward the case, and is provided so as to extend radially with respect to the center axis of the main shaft. The intake hole is provided in the rotor and sucks air from the outer surface side to the inner surface side of the rotor, and is provided at a position at a distance from the central axis of the main shaft smaller than a distance from the central axis of the main shaft to the exhaust hole.
An elevator of the present invention includes: a car which is lifted and lowered in a lifting path; a counterweight connected to the car via a main sling; and a hoist for lifting and lowering the car by winding the main rope. The hoist has the above-described structure.
Effects of the invention
According to the present invention, cooling wind having the same direction can be caused to flow between the stator and the rotor inside the winding machine independently of the rotation direction of the winding machine, and thus stabilization of cooling efficiency can be achieved.
Drawings
Fig. 1 is an overall configuration diagram of an elevator according to a first embodiment of the present invention.
Fig. 2 is a sectional configuration view of the hoist 100 according to the first embodiment of the present invention along a direction orthogonal to a rotation surface.
Fig. 3 is a sectional configuration view of the hoist 100 of fig. 2 when viewed in the direction of an arrow along a section along A-A.
Fig. 4 is a sectional configuration view of the hoist 200 according to the second embodiment of the present invention along a direction orthogonal to the rotation surface.
Fig. 5 is a sectional configuration view of the hoist 200 of fig. 4 when viewed in the arrow direction along the section on the line B-B.
Detailed Description
An elevator and an example of a hoist according to an embodiment of the present invention will be described below with reference to the drawings. The present invention is not limited to the following examples. In the drawings described below, common members are denoted by the same reference numerals.
1. First embodiment
1-1 Structure of Elevator
First, the structure of an elevator 1 according to a first embodiment of the present invention (hereinafter, referred to as "present embodiment") will be described with reference to fig. 1. Fig. 1 is a schematic configuration diagram showing a configuration example of an elevator 1 according to the present embodiment.
As shown in fig. 1, the elevator 1 according to the present embodiment performs a lifting operation in a lifting path 110 formed in a building structure. The elevator 1 includes a car 120 for loading persons and cargoes, a main rope 130, a counterweight 140, and a hoist 100. The elevating path 110 is formed in the building structure, and a machine room 160 is provided at the top thereof.
The hoist 100 is disposed in the machine room 160, and winds the main rope 130 to raise and lower the car 120. A diverting pulley 150 is provided near the hoisting machine 100 to erect the main rope 130.
The counterweight 140 is set to have substantially the same mass as the car 120 when not loaded. Therefore, when no load or no load is placed in the car 120, the tension ratio of the main rope 130 on the car 120 side to the counterweight 140 side becomes 1. This can suppress the output of the hoisting machine 100 at the time of no loading to be low.
The car 120 is formed in a hollow substantially rectangular parallelepiped shape. The car 120 is coupled to the counterweight 140 via the main rope 130, and is lifted and lowered in the lifting path 110.
1-2 Structure of windlass
Next, the hoist 100 of the present embodiment will be described with reference to fig. 2 and 3. Fig. 2 is a sectional configuration view of the hoist 100 according to the present embodiment along a direction orthogonal to the rotation surface. Fig. 3 is a sectional view of the hoist 100 of fig. 2, as viewed in the direction of the arrow, along the line A-A.
As shown in fig. 2, the hoisting machine 100 includes a housing 2, a main shaft 3, a rotating body 4, a sheave 5, a motor stator 6 (stator of the present invention), a motor rotor 7 (rotor of the present invention), and a bearing 8. In the present embodiment, the hoisting machine 100 is provided with an intake hole 9 and an exhaust hole 10 for flowing cooling air therein. In the present embodiment, an outer rotor type hoist 100 in which a motor rotor 7 is disposed radially outward of a motor stator 6 will be described as an example.
In the following description, the axial direction of the spindle 3 is referred to as the X direction. The axial direction of the spindle 3 is the vertical direction, and the lifting direction of the car 120 is the Y direction. The direction orthogonal to the X direction and the Y direction is referred to as the Z direction. In the following description, the side where the housing 2 is provided is the other side and the side where the sheave 5 is provided is the one side in the X direction. In the Y direction, the upper side of the elevating path 110 is set as the upper side, and the lower side is set as the lower side.
[ Shell ]
The housing 2 includes a cover 11 to which the spindle 3 is attached, a stator attaching portion 13 to which the motor stator 6 is attached, and a first connecting portion 12 to connect the cover 11 and the stator attaching portion 13. The housing 2 includes an outer wall portion 15 covering an outer peripheral surface of the motor rotor 7 mounted on the rotary body 4 described later, and a second coupling portion 14 coupling the stator mounting portion 13 and the outer wall portion 15.
The cover 11 is provided at a substantially central portion of the YZ plane of the housing 2, and is formed of a cylindrical member having the X direction as an axial direction. A bearing 8 having the X direction as an axial direction is provided on the inner peripheral surface side of the housing 11. An end of the spindle 3 in the X direction as an axial direction is fitted to an inner peripheral surface side of the bearing 8, and the spindle 3 is rotatably supported.
The stator mounting portion 13 is formed of a cylindrical member having an inner diameter larger than the outer diameter of the housing 11 and having the X direction as an axial direction, and is disposed radially outward of the housing 11. The motor stator 6 is fixed to the outer peripheral surface of the stator mounting portion 13 on the outer side in the radial direction. The first connecting portion 12 is provided at one end portion of the housing 11 and the stator mounting portion 13 in the X direction, and is formed of a plate-like member that connects the housing 11 and the stator mounting portion 13.
The outer wall portion 15 is formed of a tubular member having an inner diameter larger than the outer diameter of the stator mounting portion 13 and an inner peripheral surface formed in a circular shape in the YZ plane, and having the X direction as an axial direction, and is disposed outside the stator mounting portion 13 in the radial direction. The outer wall portion 15 is provided radially outward of the stator mounting portion 13. The motor stator 6 and the motor rotor 7 attached to the rotary body 4 described later are disposed in a space between the outer wall portion 15 and the stator attachment portion 13. The rotary body 4 described later is disposed on one side of the outer wall 15 in the X direction.
The second coupling portion 14 is provided at the other end portion of the stator mounting portion 13 and the outer wall portion 15 in the X direction, and is formed of a plate-like member that couples the stator mounting portion 13 and the outer wall portion 15. The second connection portion 14 is provided with an exhaust hole 10 for exhausting air from the side of the housing 2 where the motor stator 6 is provided to the other side. The exhaust hole 10 is provided, for example, at a position facing the gap between the adjacently arranged motor stators 6. The exhaust hole 10 will be described in detail later.
[ Main shaft ]
The spindle 3 is formed of a columnar member having the X direction as an axial direction. The other end of the spindle 3 in the X direction is cantilever-supported by the housing 11 via an inner peripheral side of the bearing 8 provided in the housing 2. In addition, one side of the spindle 3 is fitted to the rotating body 4.
[ rotator ]
The rotating body 4 includes a boss 16 fitted to one side of the main shaft 3, a rotor mounting portion 18 to which the motor rotor 7 is mounted, a third coupling portion 17 coupling the boss 16 and the rotor mounting portion 18, and a flange portion 19 provided continuously to the outer side in the radial direction of the rotor mounting portion 18.
The boss 16 is provided at a substantially central portion of the YZ plane of the rotary body 4, and is formed of a cylindrical member having the X direction as an axial direction. The main shaft 3 is fitted to the inner peripheral surface of the boss 16. The main shaft 3 supports the rotating body 4 rotatably with respect to the housing 2. A sheave 5 described later is fixed to the outer peripheral surface of the boss 16 on the outer side in the radial direction of the boss 16.
The rotor attachment portion 18 is formed of a cylindrical member having an inner diameter larger than the outer diameter of the boss portion 16 and having the X direction as an axial direction, and is disposed radially outward of the boss portion 16. The motor rotor 7 is fixed to the other end of the rotor mounting portion 18. The motor rotor 7 fixed to the rotor mounting portion 18 is disposed between the motor stator 6 and the outer wall portion 15 of the housing 2.
The third connecting portion 17 is provided on the outer peripheral surface of the boss 16 so as to extend from the other side of the position where the sheave 5 is mounted to one end of the rotor mounting portion 18, and is formed of a plate-like member parallel to the YZ plane. The other surface (hereinafter, inner surface) of the third connecting portion 17 is formed closer to one side than the other end surface of the boss 16. That is, the other side of the boss 16 is configured to protrude toward the case 2 side from the inner surface of the third coupling portion 17. The third connecting portion 17 is provided with an intake hole 9 described later, and a rib 20 described later is formed.
The flange portion 19 is formed of a plate-like member extending radially outward from the other end surface of the rotor mounting portion 18 than the outer peripheral surface of the outer wall portion 15 of the housing 2. The flange 19 covers the gap between the motor rotor 7 and the outer wall 15 of the housing 2.
[ rope sheave ]
The sheave 5 is formed of a cylindrical member having the X direction as an axial direction, and the main suspension 130 can be wound around the outer peripheral surface. The sheave 5 is fixed to the outer peripheral surface of the boss 16 on the outer side in the radial direction of the boss 16 and on one side in the X direction of the boss 16. The sheave 5 rotates with respect to the housing 2 by being fixed to the outer peripheral surface of the boss 16 of the rotating body 4, and by the rotation of the rotating body 4.
Motor stator
The motor stator 6 is composed of an iron core and a coil wound around the iron core. A plurality of motor stators 6 are mounted on the outer peripheral surface of the stator mounting portion 13. The plurality of motor stators 6 are arranged at predetermined intervals, for example, at equal intervals.
[ Motor rotor ]
The motor rotor 7 is formed of a magnetic member and is fixed to the other end surface of the rotor mounting portion 18 in the X direction. The motor rotor 7 is fixed to the rotor mounting portion 18 so as to be opposed to the motor stator 6 mounted on the outer peripheral surface of the stator mounting portion 13 in the radial direction with an air gap therebetween.
[ Ribs ]
The rib 20 is provided on the inner surface of the third coupling portion 17 of the rotating body 4 so as to protrude toward the housing 2. As shown in fig. 3, the ribs 20 extend radially from the outer peripheral surface of the boss 16 to the inner peripheral surface of the rotor mounting portion 18 on the inner surface of the third connecting portion 17. That is, the rib 20 is provided so as to extend radially outward from the boss 16 side. In the present embodiment, a plurality of ribs 20 are provided axisymmetrically with respect to the central axis of the main shaft 3.
In the present embodiment, the other side of the boss 16 is configured to protrude from the inner surface of the third coupling portion 17 toward the case 2 side, and the rib 20 described above is provided, so that a plurality of regions surrounded by the rib 20 and the boss 16 are formed. As shown in fig. 3, each region partitioned by the rib 20, the boss 16, and the rotor mounting portion 18 becomes a ventilation passage 21 through which air sucked from the suction hole 9 passes, as will be described later.
The width of the rib 20 in the circumferential direction of the rotor 4 can be variously changed, but is formed to a width sufficient to ensure the degree of the ventilation passage 21. In the present embodiment, the ribs 20 are formed with a constant width in the circumferential direction of the rotating body 4, but the present invention is not limited thereto, and various modifications are possible. In this case, too, the flow of the air passing through the ventilation passage 21 is not hindered.
[ air suction hole ]
The suction holes 9 are holes for sucking air from the outer surface side to the inner surface side of the rotary body 4, and are provided so as to penetrate the third connecting portion 17. As shown in fig. 2, in the present embodiment, the plurality of suction holes 9 are arranged on the circumference of a circle having a predetermined radius R1 around the rotation axis of the main shaft 3. In the present embodiment, the suction holes 9 are disposed one between each of the adjacent ribs 20 and 20, and are formed on the side of the boss 16 in the ventilation passage 21 surrounded by the rib 20 and the boss 16. In the present embodiment, the distance R1 from the center of the main shaft 3 to the suction hole 9 is set smaller than the distance R2 from the center of the main shaft 3 to the exhaust hole 10 described later. The suction hole 9 is provided so as not to overlap the exhaust hole 10 in a direction parallel to the central axis of the main shaft 3.
In the present embodiment, the suction hole 9 has a circular shape as shown in fig. 2, but the shape is not limited thereto, and may be rectangular or have various other shapes. The size of the intake hole 9 may be appropriately set according to the size of the exhaust hole 10, for example, so as not to prevent the generation of a differential pressure between the inner surface side and the outer surface side of the rotary body 4 due to the centrifugal force generated by the rotation of the rotary body 4.
[ exhaust hole ]
The exhaust hole 10 is a hole for exhausting air from the side of the housing 2 where the motor stator 6 is provided to the opposite side. The plurality of exhaust holes 10 are provided so as to penetrate the second connecting portion 14. In the present embodiment, although not shown, the plurality of exhaust holes 10 are provided on the circumference of a circle having a predetermined radius R2 around the rotation axis of the main shaft 3, and are provided at positions facing the gaps between the motor stators 6 mounted on the outer peripheral surface of the stator mounting portion 13. In the present embodiment, the distance R2 from the center of the main shaft 3 to the exhaust hole 10 is set to be larger than the distance R1 from the center of the main shaft 3 to the intake hole 9.
The shape of the exhaust hole 10 is not particularly limited, but may be formed in a rectangular slit shape, for example, or may be formed in a circular shape like the intake hole 9 shown in fig. 3, and may be formed in various shapes.
In the hoist having the above-described structure, when an alternating current flows to the motor stator 6, a magnetic field is generated that rotates in the circumferential direction of the rotating body 4, and thus an electromagnetic force acts on the motor rotor 7. Thereby, the rotating body 4 and the sheave 5 integrally rotate about the main shaft 3 as a rotation shaft. The main rope 130 is wound around the sheave 5 by rotating the sheave 5. In the hoist 100 of the present embodiment, the outside air is sucked into the hoist 100 through the suction hole 9 and discharged from the exhaust hole 10 through the inside of the hoist 100 as the rotary body 4 rotates. Whereby the hoist 100 is cooled. The cooling mechanism of the hoisting machine 100 will be described in detail below.
1-3 cooling mechanism of windlass
In the present embodiment, the centrifugal force generated by the rotation of the rotor 4 causes the movement of air in the ventilation passage 21 from the rotation axis side of the main shaft 3 to the outer radial direction of the rotor 4 on the inner surface side of the rotor 4. This movement of air occurs along the direction of extension of the ribs 20. As a result, the pressure on the center axis side of the spindle 3 decreases on the inner surface side of the rotating body 4, and a pressure difference is generated between the outer surface side and the inner surface side of the rotating body 4 on the center axis side of the spindle 3. That is, the air pressure with respect to the outer surface of the rotary body 4 becomes negative on the inner surface side in the vicinity of the suction hole 9 of the rotary body 4 due to the rotation of the rotary body 4.
On the other hand, air flowing in the direction away from the rotation axis of the rotor 4 in the ventilation passage 21 by centrifugal force flows toward the housing 2 through between the motor rotor 7 and the motor stator 6 and between the adjacent motor stators 6. In this way, in the vicinity of the exhaust hole 10 of the second coupling portion 14 of the housing 2, the pressure rises due to the inflow of air from the rotor 4 side, and a pressure difference is generated between the outer surface side and the inner surface side of the housing 2 in the vicinity of the second coupling portion 14. That is, the air pressure with respect to the outer surface of the casing 2 becomes positive pressure on the inner surface side in the vicinity of the air discharge hole 10 of the casing 2 due to the rotation of the rotary body 4.
The air is sucked from the air suction hole 9 from the outer surface side by making the inner surface side in the vicinity of the air suction hole 9 negative in pressure with respect to the outside air. On the other hand, the air on the inner surface side of the case 2 is discharged to the outer surface side by the positive pressure on the inner surface side in the vicinity of the exhaust hole 10 with respect to the outside air. As described above, in the present embodiment, the pressure distribution is formed such that the inner surface in the vicinity of the intake hole 9 becomes negative pressure compared to the outside air and the inner surface in the vicinity of the exhaust hole 10 becomes positive pressure compared to the outside air along with the rotation of the rotary body 4, and therefore, the cooling wind can always flow inside the hoist 100 during the rotation of the rotary body 4.
The pressure distribution in the vicinity of the suction hole 9 and the vicinity of the discharge hole 10 accompanying the rotation of the rotary body 4 does not depend on the rotation direction of the rotary body 4. That is, the pressure distribution is similarly generated even if the rotation direction of the rotation body 4 is different. As a result, in the hoist 100 of the present embodiment, the stable cooling air can flow into the hoist 100 regardless of the rotation direction of the rotating body 4.
In the present embodiment, the rib 20 is formed on the rear surface side of the rotary body 4. Therefore, the air on the inner surface side of the rotating body 4 flows along the radial direction of the rib 20, and thus the air also flows radially on the inner surface side of the rotating body 4. In the present embodiment, the plurality of ribs 20 are axially symmetrical, so that air flows radially along the air passage 21 axially symmetrical, and the flow of air can be stabilized.
In the present embodiment, the size, the number of the arrangement, the size of the exhaust holes 10, the number of the arrangement, and the like of the intake holes 9 may be designed so that the pressure distribution inside and outside the hoisting machine 100 becomes the pressure distribution described above, and various methods may be adopted. That is, the pressure distribution may be formed such that the inner surface in the vicinity of the intake hole 9 becomes negative pressure with respect to the outside air and the inner surface in the vicinity of the exhaust hole 10 becomes positive pressure with respect to the outside air with the rotation of the rotary body 4.
In the present embodiment, the exhaust hole 10 is provided at a position facing the gap between the adjacent motor stators 6. This can discharge the air flowing between the motor stators 6 to the outside, and can efficiently cool the motor stators 6.
In the present embodiment, the rib 20 is provided as an axisymmetric example, but the present invention is not limited thereto. The ribs 20 may not be axisymmetric, and may be formed so as to guide air flowing radially outward from the center axis side of the main shaft 3 on the inner surface side of the third connecting portion 17. By providing the ribs 20 axisymmetrically as in the present embodiment, air flows uniformly in the radial direction on the inner surface side of the third connecting portion 17, and therefore air can flow efficiently.
As described above, in the present embodiment, the radial ribs 20 are provided on the inner surface side of the rotating body 4, so that the flow of the air to be caused to flow in the radial direction along with the rotation of the rotating body 4 can be made radial. Further, by providing the intake hole 9 at a position of the rotary body 4 close to the rotary shaft and providing the exhaust hole 10 at a position of the casing 2 opposed to the gap between the motor stators 6, and making the diameter R1 of the hole row of the intake hole 9 smaller than the diameter R2 of the hole row of the exhaust hole 10, it is possible to form the flow of air inside the hoist 200 in which the differential pressure is generated. The cooling air can be caused to flow by the differential pressure in the hoisting machine 200 generated by the rotation of the rotor 4.
In the present embodiment, the suction hole 9 is provided in the third connecting portion 17, but the position where the suction hole 9 is formed is not limited to this, as long as the distance R1 from the central axis of the main shaft 3 to the suction hole 9 is smaller than the distance R2 from the central axis of the main shaft 3 to the exhaust hole 10. Hereinafter, as a second embodiment, an example will be described in which the position of the suction hole 9 is arranged at a position different from that of the first embodiment.
2. Second embodiment
Fig. 4 is a sectional configuration view of the hoist 200 according to the second embodiment of the present invention along a direction orthogonal to the rotation surface. Fig. 5 is a sectional configuration view of the hoisting machine 200 of fig. 4, as viewed from the arrow direction, along the section on the line B-B. In fig. 5, a cross-sectional view of the suction hole 30 at a position different from that of fig. 3 is shown for easy understanding of the position. The hoist 200 of the present embodiment is also applicable to the elevator 1 shown in fig. 1, as in the first embodiment. In fig. 4 and 5, the same reference numerals are given to the portions corresponding to fig. 2 and 3, and overlapping description thereof is omitted.
As shown in fig. 4, the suction holes 30 are provided in the boss 16 of the rotary body 4, and are arranged in plural on the circumference of a circle having a predetermined radius R3 around the rotation axis of the spindle 3. The suction hole 30 is formed by a long hole portion 30a and a lateral hole portion 30 b. The long hole portion 30a is formed in the boss portion 16 in parallel with the rotation axis of the spindle 3 from the outer surface side to the inner surface side of the rotary body 4. The lateral hole portion 30b is provided from the side peripheral surface side of the boss portion 16 in a direction orthogonal to the rotation axis of the spindle 3, and communicates the long hole portion 30a with the ventilation passage 21. In the present embodiment, the air sucked from the suction hole 30 flows into the ventilation passage 21 through the long hole portion 30a and the lateral hole portion 30 b.
In the present embodiment as well, as in the first embodiment, the region surrounded by the rib 20 and the boss 16 on the back surface side of the rotating body 4 becomes the ventilation passage 21. The air sucked from the suction hole 30 flows into the ventilation passage 21 from the lateral hole portion 30b provided in the boss portion 16.
In the present embodiment, as in the first embodiment, air on the side of the rotation axis of the spindle 3 flows radially outward on the inner surface side of the rotating body 4 by the centrifugal force generated by the rotation of the rotating body 4. As a result, the air in the vicinity of the boss 16 of the ventilation passage 21 flows in the radial direction of the rotor 4, and thus the vicinity of the intake hole 30 becomes negative pressure compared with the outside air. Accordingly, air is sucked from the suction hole 30 and flows toward the exhaust hole 10 via the ventilation passage 21. As a result, in the present embodiment, the cooling air can flow into the hoisting machine 200 along with the rotation of the rotating body 4.
As described above, in the present invention, unlike the conventional structure in which the cooling air is sent out by using the blower blade having the fluid shape, the cooling air having the same direction can be sent into the hoist independently of the lifting direction of the car of the elevator, and thus the cooling efficiency can be stabilized.
In the above-described embodiment, the hoist provided in the elevator provided with the machine room has been described, but the hoist of the present invention can be applied to an elevator without a machine room. In the above embodiment, the outer rotor type hoist has been described as an example, but the present invention can also be applied to an inner rotor type hoist.
The above-described embodiments are described in detail for the purpose of easily understanding the present invention, and are not necessarily limited to the configuration having all of the descriptions. For example, a part of the structure of the embodiment may be replaced with another structure, and another structure may be added to the structure of the embodiment. In addition, with respect to a part of the structure of the embodiment, addition, deletion, and substitution of other structures can be performed.
Description of the reference numerals
1: an elevator; 2: a housing; 3: a main shaft; 4: a rotating body; 5: a rope pulley; 6: a motor stator; 7: a motor rotor; 8: a support table; 9. 30: an air suction hole; 10: an exhaust hole; 11: an outer cover; 12: a first connecting portion; 13: a stator mounting portion; 14: a second connecting portion; 15: an outer wall portion; 16: a boss; 17: a third connecting portion; 18: a rotor mounting portion; 19: a flange portion; 20: a rib; 21: an air passage; 30a: a long hole portion; 30b: a transverse hole portion; 100: a hoist; 110: a lifting path; 130: a main sling; 140: a counterweight; 150: a diverting pulley; 160: a machine room.
Claims (7)
1. A hoist, wherein,
the hoist includes:
a housing provided with a stator;
a main shaft supported by the housing;
a rotor that is supported by the main shaft, has a rotor disposed at a position facing the stator, and rotates relative to the housing with the stator and the rotor;
a sheave provided on an outer surface of the rotating body opposite to an inner surface, which is a surface of the rotating body on the housing side in the axial direction of the main shaft; and
a rib which is a convex rib protruding toward the case side on the inner surface of the rotating body and is provided so as to extend radially with respect to a central axis of the main shaft,
the housing is provided with a vent hole for exhausting air from one side where the stator is provided to the opposite side,
the rotor is provided with an air intake hole that sucks air from the outer surface side to the inner surface side of the rotor at a position that is less than a distance from the central axis of the main shaft to the air discharge hole.
2. The hoist as claimed in claim 1, wherein,
the plurality of exhaust holes are provided at predetermined intervals in a circumferential direction with respect to a central axis of the spindle.
3. The hoist as claimed in claim 1, wherein,
the suction holes are provided in a plurality at predetermined intervals in a circumferential direction with respect to a central axis of the spindle.
4. The hoist as claimed in claim 3, wherein,
the ribs are provided in a plurality so as to be axisymmetric with respect to the central axis of the main shaft,
the suction holes are provided between the adjacently arranged ribs.
5. The hoist as claimed in claim 2, wherein,
the stator is provided with a plurality of stators at a prescribed interval in the circumferential direction relative to the central axis of the main shaft,
the exhaust hole is provided at a position facing a gap between the adjacently disposed stators.
6. The hoist as claimed in claim 1, wherein,
the ribs are provided in a plurality so as to be axisymmetric with respect to the central axis of the main shaft,
the suction holes are provided between the adjacently arranged ribs, and a plurality of the suction holes are provided along a circumferential direction with respect to a central axis of the main shaft,
the stator is provided with a plurality of stators at a prescribed interval in the circumferential direction relative to the central axis of the main shaft,
the exhaust holes are provided at positions facing the gaps between the adjacently arranged stators, and are provided in plurality along a circumferential direction with respect to the central axis of the main shaft.
7. An elevator, wherein,
the elevator is provided with:
a car which is lifted and lowered in a lifting path;
a counterweight connected to the car via a main sling; and
a hoist for winding the main rope to raise and lower the car,
the hoist includes:
a housing provided with a stator;
a main shaft supported by the housing;
a rotor that is supported by the main shaft, has a rotor disposed at a position facing the stator, and rotates relative to the housing with the stator and the rotor;
a sheave provided on an outer surface of the rotating body opposite to an inner surface, which is a surface of the rotating body on the housing side in the axial direction of the main shaft; and
a rib which is a convex rib protruding toward the case side on the inner surface of the rotating body and is provided so as to extend radially with respect to a central axis of the main shaft,
the housing is provided with a vent hole for exhausting air from one side where the stator is provided to the opposite side,
the rotor is provided with an air intake hole that sucks air from the outer surface side to the inner surface side of the rotor at a position that is less than a distance from the central axis of the main shaft to the air discharge hole.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2021/004543 WO2022168298A1 (en) | 2021-02-08 | 2021-02-08 | Hoisting machine and elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116963987A true CN116963987A (en) | 2023-10-27 |
Family
ID=82742106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180092584.8A Pending CN116963987A (en) | 2021-02-08 | 2021-02-08 | Hoist and elevator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2022168298A1 (en) |
| CN (1) | CN116963987A (en) |
| WO (1) | WO2022168298A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001258210A (en) * | 2000-03-13 | 2001-09-21 | Mitsubishi Electric Corp | Gearless hoist for elevator |
| JP2006081305A (en) * | 2004-09-09 | 2006-03-23 | Mitsubishi Electric Corp | Toroidally wound motor for elevator |
| JP4857924B2 (en) * | 2006-06-09 | 2012-01-18 | マックス株式会社 | Brushless motor |
| JP5710396B2 (en) * | 2011-06-22 | 2015-04-30 | 株式会社日立製作所 | Elevator hoisting machine |
| JP2015229587A (en) * | 2014-06-06 | 2015-12-21 | 三菱電機株式会社 | Hoisting machine for elevator |
| JP2016105668A (en) * | 2014-12-01 | 2016-06-09 | 株式会社日立製作所 | Motor and hoist for elevator device |
| WO2020053968A1 (en) * | 2018-09-11 | 2020-03-19 | 三菱電機株式会社 | Elevator hoisting machine |
-
2021
- 2021-02-08 JP JP2022579289A patent/JPWO2022168298A1/ja active Pending
- 2021-02-08 CN CN202180092584.8A patent/CN116963987A/en active Pending
- 2021-02-08 WO PCT/JP2021/004543 patent/WO2022168298A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022168298A1 (en) | 2022-08-11 |
| JPWO2022168298A1 (en) | 2022-08-11 |
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