JP2001258210A - Gearless hoist for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain temperature rise of a gearless hoist for an elevator by effectively discharging heat which is a factor of failure wherein heat generation of a stator coil of a hoist increases as the speed and the capacity of an elevator are increased. SOLUTION: A phase coil is made to serve as a heat pipe, and discharges the heat of the coil. Further, a fan-shaped protruding body is installed on a sheave. When the sheave rotates, wind is generated and performs air-cooling of a radiation fin part of the phase coil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a sheave for raising and lowering a car and a counterweight, a synchronous motor type rotating electric machine using a permanent magnet for directly driving the sheave, and a phase ring of the rotating electric machine. The present invention relates to a gearless hoist for an elevator.

[0002]

2. Description of the Related Art FIG.
1 is a diagram of a rotating electric machine having a heat pipe type cooling device therein, FIG. 10 is a diagram of a conventional elevator gearless hoist having an open frame using the same, FIG.
FIG. 1 is a view of a conventional elevator gearless hoist having a hermetically sealed frame using the same. In the figure, 1 is a stator, 1A is 1B, a stator frame, 2A
Is a stator core fitted into the stator frame 1B, 3 is a stator coil inserted inside the stator core 2A, 3A is a slot bottom side winding of the stator coil 3, 3B is a slot opening side winding of the stator coil,
3C is a lead of the stator coil 3, 4 is a rotor, 4A is a permanent magnet support of the rotor 4, 4B is a fin for cooling the inside of the rotor 4, 4C is a permanent magnet of the rotor 4, 4D is a shaft of the rotor 4, 5 is Bearing 6, intake port 7, exhaust port 8, windbreak plate 9, stator coil 3
A plate-shaped heat pipe type cooling device mounted in the gap of 10 is a phase ring for adjusting the phase of the current flowing through the stator coil 3, 11 is a brake disk, 12
Is a sieve.

When an electric current is applied to the stator coil 3 of the hoist to move the elevator, the rotor 4 rotates, and the sheave 12 fixed to the end of the rotor 4 is rotated. Raise and lower the elevator car and counter weight via At this time, the stator coil 3 and the phase ring 10 of the hoisting machine are used.
Generates excessive heat, but an excessive rise in temperature due to this heat leads to a failure of the hoist. To prevent this, the stator coil 3 is provided with a plate-shaped heat pipe cooling device 9 for heat radiation. This heat pipe type cooling device 9 is a device in which a working fluid that changes between a liquid phase and a gas phase with a small temperature difference is sealed in a sealed structure including a horizontal bottom portion and an end facing obliquely upward. . Due to the heat generated by the stator coil 3, the working fluid sealed in the bottom of the heat pipe type cooling device 9 evaporates, rises inside the pipe and collects at the upper end. The vaporized hydraulic fluid is cooled and liquefied by the surrounding air at the upper end, descends along the inner wall, and returns to the bottom. At this time, the stator coil 3 is cooled by heat of vaporization at the bottom, and the temperature of the surrounding air is raised by latent heat of liquefaction at the upper end.

In the case of the open type frame shown in FIG. 10, the end of the heat pipe is taken in from the intake port 6 by the internal cooling fins 4B rotating integrally with the rotor 4, and is taken out from the exhaust port 7.
It is cooled by the air exhausted. Here, the arrow A in FIG. 9 schematically shows this air flow. Although cooled by airflow, a certain temperature rise of the stator coil 3 is inevitable. Further, the temperature rise of the phase ring 10 is unavoidable.

In the case of the closed type frame shown in FIG. 11, both ends of the heat pipe are cooled by blowing air in the frame by internal cooling fins 4B which rotate integrally with the rotor 4. Here, the arrow A in FIG. 10 schematically shows this air flow. In the closed type, this airflow is not exhausted to the outside, and the heat exchange is through the frame.
And the temperature rise of the phase ring is large.

[0006]

With the recent increase in speed and capacity of elevators, gearless hoists for elevators have increased in speed and capacity. On the other hand, the efficiency has been improved by using high-performance permanent magnets, and the outer shape of the hoist has been reduced in size and density. For this reason, the calorific value per unit volume is increasing, and it is necessary to more efficiently discharge the heat generated by the stator coil. In addition, with the increase in capacity, heat generation in the phase ring is increasing, and this cooling is also required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and is intended to more efficiently cool a gearless hoist than conventionally.

[0008]

A gearless hoist for an elevator according to the present invention comprises a sheave for raising and lowering a car and a counterweight via a rope, and a synchronous motor-type rotating electric machine using a permanent magnet for directly driving the sheave. A gearless hoist for an elevator equipped with a phase ring of the rotating electric machine, wherein a sealed hollow ring-shaped member also serving as the phase ring, and a phase ring dual-purpose heat comprising a working fluid sealed inside the hollow ring-shaped member. It has a pipe type cooling device.

Also, the hollow ring-shaped member, a hollow outlet member electrically connected to an upper end of the hollow ring-shaped member and drawn laterally or obliquely upward from the hollow ring-shaped member, and a terminal end of the outlet member. The heat pipe type cooling device also serves as a phase ring, which includes a radiation fin member to be joined and a working fluid sealed inside the hollow ring-shaped member.

[0010] Further, the heat pipe type cooling device combined with the phase ring and the hollow ring member of the heat pipe type cooling device combined with the phase ring are disposed inside the stator coil of the rotating electric machine and one end thereof is pulled out obliquely upward. And a second heat pipe type cooling device formed by enclosing a working fluid inside a hermetically sealed hollow tube member that is brought into close contact with the upper end of the cooling device.

Further, it is manufactured separately from the sheave,
A fan-shaped projection is fixedly attached to the sheave, and exhausts air around the phase ring heat pipe in a centrifugal direction as the sheave rotates.

Further, there is provided a fan-shaped projection formed integrally with the sheave and for exhausting air in the vicinity of the phase ring heat pipe type cooling device in the centrifugal direction as the sheave rotates.

Further, in the double three-phase winding type motor having the brake disc ring, the heat pipe combined with the phase ring is formed integrally with the brake disc ring and is provided on the anti-sheave side with the rotation of the brake disc ring. A fan-shaped projection for exhausting air in the vicinity of the cooling device in the centrifugal direction is provided.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 shows an elevator gearless hoist according to a first embodiment of the present invention. FIG. 2 is a view taken along a line AA in FIG. 1, and FIG.
B is shown. This example is a hermetic gearless hoist. In the figure, 1 is a stator, 1B is a stator frame,
2A is a stator core fitted into the stator frame 1B, 3 is a stator coil inserted inside the stator core 2A, 3A is a lead lead of the stator coil 3, 4 is a rotor, 4A is a permanent magnet support of the rotor 4, 4B Is a cooling fin of the rotor 4, 4C is a permanent magnet of the rotor 4, 4D is a shaft of the rotor 4, 5 is a bearing, 6 is an intake port, 7 is an exhaust port, 8 is a windbreak plate, 11 is a brake disk, and 12A is Sheave, 12B is sheave 12
, 13 denotes a phase ring-cum-heat pipe cooling device used as a phase ring for adjusting the phase of the current flowing through the stator coil 3, 13 A denotes a hollow ring member of the phase ring-used heat pipe cooling device 13, 1.
Reference numeral 3B denotes an outlet member of the phase-ring combined heat pipe cooling device 13, 13C denotes a radiating fin member of the phase ring combined heat pipe cooling device 13, and 14 denotes a heat pipe support for supporting the phase ring combined heat pipe cooling device 13. .

When an electric current is applied to the stator coil 3 of the hoist to move the elevator, the rotor 4 rotates, and the sheave 12A fixed to the end of the rotor 4 rotates.
The elevator car and the counterweight are moved up and down via the rope wound around the sheave 12A.
At this time, part of the heat generated in the stator coil 3 is cooled by the air blown from the internal cooling fins 4B as the rotor 4 rotates. An arrow A1 in the figure schematically shows this air flow. However, since the stator coil 3 is made of a copper wire having high thermal conductivity, most of the generated heat is transmitted through the lead 3A to the hollow ring member 1 of the heat pipe type cooling device 13 which also serves as a phase ring.
3A. In the phase ring / heat pipe cooling device 13, the working fluid is vaporized by heat at the hollow ring member 13A, passes through the outlet member 13B, reaches the radiating fin member 13C, and is cooled and liquefied here to form a pipe. It goes down along the wall and returns to the hollow ring member 13A. On this occasion,
The heat is removed from the hollow ring member 13A by the heat of vaporization, and the heat is discharged to the air by the radiating fin member 13C by the latent heat of liquefaction.

Here, the radiating fin member 13C of the phase-ring heat pipe type cooling device 13 is moved from the fan-shaped projection 12B to the radiating fin member 13B with the rotation of the sheave 12A.
It is efficiently cooled by the air blown around C.
An arrow A2 in the figure schematically shows this air flow.

As described above, since the phase ring is the heat pipe type cooling device 13 serving also as the phase ring, it is possible to efficiently discharge the heat generated by the stator coil.

Further, the phase ring type cooling device 13 includes an outlet member 13B drawn out of the phase ring member 13a,
Since the radiation fin member 13C to be joined to the outlet member 13 is provided, the heat of the stator coil 3 absorbed by the phase ring member 13a can be efficiently discharged.

In addition, the heat pipe type cooling device 13 for both phase ring and the fan-shaped projection 1 is rotated by rotation of the sheave 12A.
Since cooling is performed by the air blown from 2B to the radiation fin member 13C, the heat of the stator coil 3 can be more efficiently discharged.

Here, the fan-shaped projection 12B may be formed integrally with the sheave 12A, but may be formed separately from the sheave 12A and fixed to the sheave 12A by means such as bolting. Or any of them. In the case of a single body, there is an advantage that the production time is small, and in the case of a separate body, it can be replaced relatively easily. Therefore, there is an advantage that the shape can be optimized while judging the state of the air flow.

Embodiment 2 FIG. FIG. 4 shows an elevator gearless hoist according to a second embodiment of the present invention. FIG. 5 shows a view AA in FIG. 4 and FIG. 6 shows a view BB in FIG.
In the figure, reference numeral 9 denotes a conventional heat pipe type cooling device mounted on the core of the stator coil 3. Note that the same reference numerals as those in the above-described drawings denote corresponding parts, and a description thereof will be omitted.

With this configuration, the air blown from the fan-shaped projections along with the rotation of the sheave is used as the stator coil 3.
, The heat generated in the stator coil 3 is cooled to some extent. An arrow A1 in the figure schematically shows this air flow.

Third Embodiment FIG. 7 shows an elevator gearless hoist according to a third embodiment of the present invention. FIG. 5 is a view taken along line AA of FIG. 7, and FIG. -B is indicated. In the figure, reference numeral 15 denotes a second heat pipe type cooling device which is attached to a core portion of the stator coil 3 and one end of which is pulled out obliquely upward and brought into close contact with the hollow ring member 13A, and 16 denotes an external cooling ring. Fin support. In the drawings, the same reference numerals as those in the above-described drawings denote corresponding parts, and a description thereof will be omitted.

The heat generated in the core portion of the stator coil 3 evaporates the working fluid sealed in the second heat pipe type cooling device 15, and the stator coil 3 is cooled by the heat of evaporation. The vaporized hydraulic fluid reaches the portion in contact with the hollow ring member 13A, liquefies, and returns to the portion in contact with the stator coil 3 again. At this time, heat discharged by liquefaction is transmitted to the hollow ring member 13A.

Thus, the second heat pipe cooling device 15 transfers the heat of the core portion of the stator coil 3 to the phase ring heat pipe cooling device 13. As described in the first embodiment, the heat pipe type cooling device 13 that also serves as a phase ring efficiently discharges heat, so that the second heat pipe type cooling device 15 efficiently removes the heat of the core of the stator coil 3. Can be exhausted.

Fourth Embodiment FIG. 8 shows a fourth embodiment of the elevator gearless hoist according to the present invention. This example is an example of a double three-layer type rotating electric machine. In the figure, 11A is a brake disc, 11A
B is a fan-shaped projection provided on the brake disk 11A. In the drawings, the same reference numerals as those in the above-described drawings denote corresponding parts, and a description thereof will be omitted.

Along with the rotation of the brake disk 11A, air is blown by the fan-shaped projections 11B as indicated by A3 in the figure, and the phase coil / heat pipe type cooling device 13 provided on the brake coil side of the stator coil 3 is cooled.

[0028]

Since the present invention is configured as described above, it has the following effects. A gearless hoist for an elevator according to the present invention includes a sheave that raises and lowers a car and a counterweight via a rope, a synchronous motor-type rotating electric machine using a permanent magnet that directly drives the sheave, and a phase ring of the rotating electric machine. In a gearless hoist for elevators comprising: a sealed hollow ring-shaped member also serving as the phase ring, and a phase-ring combined heat pipe type cooling device comprising a working fluid sealed inside the hollow ring-shaped member. ing. Therefore, the heat generated by the stator coil can be discharged more than before.

Further, the hollow ring-shaped member, a hollow outlet member which is electrically connected to an upper end of the hollow ring-shaped member, and is drawn out sideways or obliquely upward from the hollow ring-shaped member, and at a terminal end of the outlet member. The heat pipe type cooling device also serves as a phase ring, which includes a radiation fin member to be joined and a working fluid sealed inside the hollow ring-shaped member. Therefore, heat generated by the stator coil can be efficiently exhausted.

Further, the heat pipe type cooling device combined with phase ring and the hollow ring member of the heat pipe type cooling device combined with phase ring are disposed inside the stator coil of the rotating electric machine and one end thereof is pulled out obliquely upward. And a second heat pipe type cooling device formed by enclosing a working fluid inside a hermetically sealed hollow tube member that is brought into close contact with the upper end of the cooling device. Therefore, the heat generated by the stator coil can be more efficiently exhausted.

Further, it is manufactured separately from the sheave,
A fan-shaped projection is fixedly attached to the sheave, and exhausts air around the phase ring heat pipe in a centrifugal direction as the sheave rotates. For this reason,
Since the phase ring heat pipe is cooled by air, the heat generated by the stator coil can be efficiently exhausted.

Further, there is provided a fan-shaped projection formed integrally with the sheave, and for exhausting air in the vicinity of the phase ring heat pipe type cooling device in the centrifugal direction with the rotation of the sheave. For this reason, since the phase ring heat pipe is cooled by air, the heat generated by the stator coil can be efficiently exhausted.

Further, in the double three-phase winding type motor having the brake disc ring, the heat pipe combined with the phase ring is formed integrally with the brake disc ring and is disposed on a side opposite to the sheave with rotation of the brake disc ring. A fan-shaped projection for exhausting air in the vicinity of the cooling device in the centrifugal direction is provided. For this reason, since the phase ring heat pipe type cooling device on the anti-sheave side is cooled by air, the heat generated by the stator coil can be efficiently exhausted.

[Brief description of the drawings]

FIG. 1 is a diagram of Embodiment 1 of a gearless hoist for an elevator of the present invention.

FIG. 2 is a view taken along a line AA in FIG. 1;

FIG. 3 is a view taken along a line BB in FIG. 1;

FIG. 4 is a diagram of a gearless hoist for an elevator according to a second embodiment of the present invention.

FIG. 5 is a view taken along the line AA of FIGS. 4 and 7;

FIG. 6 is a view taken along the line BB in FIGS. 4 and 7;

FIG. 7 is a view of Embodiment 3 of a gearless hoist for an elevator according to the present invention.

FIG. 8 is a view of Embodiment 4 of a gearless hoist for an elevator according to the present invention.

FIG. 9 is a diagram of a conventional heat pipe cooling device inside a rotating electric machine disclosed in Japanese Patent Application Laid-Open No. 10-248221.

FIG. 10 is a diagram of a gearless hoist for an elevator using a conventional heat pipe type cooling device inside a rotary electric machine disclosed in Japanese Patent Application Laid-Open No. 10-248221. (Open frame)

FIG. 11 is a view of a gearless hoist for an elevator using a conventional heat pipe type cooling device inside a rotating electric machine disclosed in Japanese Patent Application Laid-Open No. 10-248221. (Closed frame)

[Explanation of symbols]

1 stator, 1A stator cooling fin, 1
B stator frame, 2 cores, 2A stator core, 3 stator coil, 3C stator coil 3 lead lead, 4 rotor, 4A rotor permanent magnet support, 4B rotor internal cooling fin,
4C rotor permanent magnet, 4D rotor shaft, 5 bearings, 6 intake port, 7 exhaust port, 8 windbreak board,
9 heat pipe type cooling device, 10 phase ring, 1
1, 11A brake disc, 11B Fan-shaped projections provided on brake disc, 12, 12A sheave, 12
B Fan-shaped projection provided on sheave, 13 Heat pipe cooling device also used for phase ring, 13A Hollow ring member of heat pipe cooling device also used for phase ring, 13B Protrusion member for heat pipe cooling device also used for phase ring, 13C
Radiation fin member of phase ring combined heat pipe cooling device, 14 heat pipe support, 15 second heat pipe cooling device, 16 external cooling ring fin support, 1
7 Double three-layer stator coil.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) H02K 21/14 H02K 21/14 MF term (Reference) 3F306 AA00 BA07 BA09 BB01 5H603 AA12 AA13 BB01 BB09 BB12 CA01 CA05 CB02 CB04 CB05 CC03 5H605 AA01 BB05 BB10 CC01 CC08 DD12 DD14 5H609 BB03 BB16 BB18 PP02 PP05 PP06 PP07 PP08 PP09 QQ02 QQ06 QQ07 QQ09 QQ10 QQ23 RR06 RR22 RR61 RR62 RR63 RR67 RR69 5H621

Claims (8)

[Claims] 1. An elevator comprising a sheave for raising and lowering a car and a counterweight via a rope, a synchronous electric rotating machine using a permanent magnet for directly driving the sheave, and a phase ring of the rotating electric machine. In a gearless hoist, an elevator having a sealed hollow ring-shaped member used as the phase ring, and a phase ring-cum-heat pipe cooling device comprising a working fluid sealed inside the hollow ring-shaped member. Gearless hoist. 2. The hollow ring-shaped member, a hollow outlet member that is electrically connected to an upper end of the hollow ring-shaped member, and is drawn out laterally or obliquely upward from the hollow ring-shaped member, and at a terminal end of the outlet member. 2. The gearless hoist for an elevator according to claim 1, further comprising: a heat pipe type cooling device that also serves as a phase ring, comprising a radiating fin member to be joined and a working fluid sealed in the hollow ring-shaped member. 3. 3. The hollow ring member of the phase-ring heat pipe cooling device which is disposed inside the stator coil of the rotating electric machine and one end of which is drawn obliquely upward, and wherein the hollow ring member of the phase-ring heat pipe cooling device is provided. And a second heat pipe type cooling device formed by enclosing a working fluid inside a sealed hollow tube member which is brought into close contact with the upper end of the heat pipe type cooling device. Gearless hoist for elevators. 4. A fan-shaped projection formed separately from the sheave, fixedly attached to the sheave, and exhausting air around the phase-ring heat pipe in a centrifugal direction as the sheave rotates. An elevator gearless hoist according to claim 1. 5. A fan-shaped projection formed integrally with the sheave and exhausting air in the centrifugal direction near the phase ring / heat pipe cooling device with rotation of the sheave. A gearless hoist for an elevator as described in the above. 6. The double-phase three-phase motor according to claim 1, wherein each of said phase rings arranged symmetrically has said heat pipe type cooling device combined with said phase ring. A gearless hoist for an elevator as described in the above. 7. The double three-phase winding type motor having a brake disc ring, which is separately manufactured, fixedly attached to the brake disc ring, and is attached to the anti-sheave side with the rotation of the brake disc ring. 7. The elevator gearless hoist according to claim 6, further comprising a fan-shaped projection for exhausting air around the phase ring / heat pipe cooling device in a centrifugal direction. 8. The double-phase three-phase winding motor having the brake disc ring, wherein the heat pipe is formed integrally with the brake disc ring, and is provided on the anti-sheave side with the rotation of the brake disc ring. 7. The elevator gearless hoist according to claim 6, further comprising a fan-shaped projection for exhausting air near the cooling device in a centrifugal direction.