CN219181263U

CN219181263U - Elevator and elevator for elevator

Info

Publication number: CN219181263U
Application number: CN202223351981.3U
Authority: CN
Inventors: A.科佩拉; J.罗西; T.麦拉里宁; J.塔瓦奈宁
Original assignee: Kone Corp
Current assignee: Kone Corp
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-06-13
Anticipated expiration: 2032-12-14
Also published as: DE202023106217U1

Abstract

The utility model discloses a hoist and an elevator, comprising: a frame (3); -a stator winding (2) attached to the frame (3); -a rotor (4), the rotor (4) being configured to rotate about a rotation axis (6), facing and spaced apart from the stator winding (2) along the rotation axis to form a gap between the rotor (4) and the stator winding (2); and a traction sheave (7), the rotor (4) being connected or integrated to the traction sheave (7), wherein the hoisting machine further comprises a protective cover (9, 9 '), the protective cover (9, 9 ') being fixed to the frame (3) and configured to prevent access to the gap, the protective cover (9, 9 ') comprising a ventilation hole (12) in fluid communication with the gap.

Description

Elevator and elevator for elevator

Technical Field

The utility model relates to a hoisting machine for an elevator and an elevator comprising such a hoisting machine, which hoisting machine comprises a protective cover plate.

Background

The presence of a gap between the stator and the rotor of an axial flux permanent magnet machine may be sensitive to small particles and/or water droplets. To remedy this situation and increase the IP level, motors with reduced clearances have been developed. However, this tends to hamper the cooling of the motor, which means that the motor must be specially designed with an additional cooling system and/or the rated power of the motor will be reduced.

Disclosure of Invention

In view of the above problems, according to the present utility model, there is provided a hoist including: a frame; a stator winding attached to the frame; a rotor configured to rotate about a rotational axis, facing and spaced apart from the stator windings along the rotational axis to form a gap between the rotor and the stator windings; and a traction sheave to which the rotor is connected or integrated, wherein the hoisting machine further comprises a protective cover secured to the frame and configured to prevent access to the gap, the protective cover comprising a ventilation hole in fluid communication with the gap.

The utility model has the following advantages: the modular protective cover plate prevents small particles and/or water droplets from entering the gap between the rotor 4 and the stator winding 2, improves the IP level of the elevator hoisting machine 1, while still ensuring a cooling effect without providing an additional cooling system, and the rated power of the motor is not reduced. Furthermore, since the protective cover is modular, no modification of the high-capacity elevator hoisting machine with IP grade 21 is required, and only by adding the protective cover, a low-capacity elevator hoisting machine with IP grade 42 can be obtained.

The hoisting machine according to the utility model may have one or more of the following features.

According to one embodiment, the body of the protective cover plate is formed as a circular ring-shaped plate, which body extends in a plane perpendicular to the axis of rotation after the protective cover plate has been fitted in place. The protective cover plate thus oriented is more capable of achieving the protective and cooling effects of the present utility model.

According to one embodiment, the traction sheave comprises a brake wheel, at least a part of which is arranged radially outside the rotor, the frame comprises a mounting part extending axially from the stator winding side to the rotor side radially outside the brake wheel, the mounting part extending in axial direction over a length such that it covers the gap at least in circumferential direction, and a channel is left between the mounting part and the brake wheel in fluid communication with the gap, the protective cover covering the channel. The mounting portion protects the gap in the circumferential direction and provides a place to mount the protective cover plate so that the protective cover plate can extend on a plane perpendicular to the rotation axis, thereby better achieving the effect of the present utility model.

According to one embodiment, the vent holes are oriented in an axial direction so that air can enter the gap through the vent holes through the protective cover plate.

According to one embodiment, the ventilation holes have a width equal to or less than 1mm, complying with the IP level 42 of protection against particles and/or water drops, which is often required for elevator lifts in severe conditions.

According to one embodiment, the protective cover is assembled from two parts, thereby facilitating the installation of the protective cover.

According to one embodiment, the protective cover plate further comprises a water-proof portion configured to guide water droplets, the water-proof portion protruding obliquely downward from an upper portion of the protective cover plate away from the gap, the water-proof portion being provided to be more advantageous in preventing water droplets from entering the gap.

According to one embodiment, the waterproof part is integrally formed with the main body of the protective cover plate, facilitating modularization, installation and use of the protective cover plate.

According to one embodiment, the waterproof part has a circular arc-shaped cross section, which is beneficial to guiding water drops.

According to the utility model, an elevator comprising the hoisting machine is also presented.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the following description will briefly explain the drawings of the embodiments of the present utility model. Wherein the showings are for the purpose of illustrating some embodiments of the utility model only and not for the purpose of limiting the same.

Fig. 1 is a cross-sectional view of a hoist according to one embodiment of the present utility model.

Fig. 2 is a cross-sectional view of a protective cover plate of a hoist according to one embodiment of the utility model.

Fig. 3 is a perspective view of a hoist according to one embodiment of the present utility model.

Fig. 4 is a cross section of a protective cover plate of a hoist according to one embodiment of the utility model.

List of reference numerals

1. Lifting machine

2. Stator winding

3. Frame

4. Rotor

5. Magnet body

6. Axis of rotation

7. Traction sheave

9,9' protective cover plate

10. Waterproof part

11. Brake wheel

12. Vent hole

Detailed Description

In order to make the objects, technical solutions and advantages of the technical solutions of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present utility model. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

The utility model is described in detail below by way of description of example embodiments.

Permanent magnet motors are widely used in elevator hoists. Fig. 1 schematically shows a cross section of a hoisting machine 1 according to the utility model, which hoisting machine 1 is e.g. a hoisting machine of an elevator, with an axial flux permanent magnet motor. The permanent magnet motor may comprise an annular stator and a rotor 4, the rotor 4 being configured to rotate about an axis of rotation 6, the stator winding 2 being attached to the frame 3 of the motor, the rotor 4 comprising permanent magnets 5. The rotor 4 faces and is spaced apart from the stator windings 2 along the rotation axis to form a gap between the rotor 4 and the stator windings 2, that is, the magnets 5 of the rotor 4 and the windings 2 of the stator are arranged in an axial flux arrangement, which means that the flux passes through the gap between the stator and the rotor substantially in the direction of the rotation axis 6 of the machine.

The rotor 4 may be connected or integrated to the traction sheave 7 of the hoisting machine. The traction sheave 7 may comprise grooves for ropes (not shown) which frictionally interact with the hoisting ropes for driving the elevator car in the elevator shaft. The term "rope" includes steel wire ropes, ropes with high friction coatings, such as polyurethane coatings, as well as belts and flat ropes. The traction sheave 7 may also comprise a brake wheel 11 and a brake (not shown), the brake wheel 11 being e.g. integral with the traction sheave 7 or integrated into the traction sheave 7 so as to rotate therewith, the brake being operated in braking engagement with a braking surface of the rotating brake wheel 11.

In order to prevent small particles and/or water droplets from entering the gap between the rotor 4 and the stator winding 2 and to increase the IP level of the elevator hoisting machine 1, the hoisting machine 1 further comprises a modular protective cover plate 9,9', which protective cover plate 9,9' is fixed to the frame 3 and configured to prevent access to the gap, which in fig. 3 is covered by the protective cover plate 9,9' and is thus not visible.

Preferably, at least a portion of the brake wheel 11 is arranged radially outside the rotor 4, as shown in fig. 1. The frame 3 comprises a mounting portion extending axially from the stator winding side to the rotor side radially outside the brake wheel 11, the mounting portion extending in the axial direction over a length such that it covers the gap at least in the circumferential direction and leaves a channel between the mounting portion and the brake wheel 11 in fluid communication with the gap, which channel is covered by a protective cover plate 9,9', the protective cover plate 9,9' being mounted for example to the rotor side facing surface of the mounting portion, thereby preventing access to the gap between the rotor 4 and the stator winding 2, e.g. preventing small particles such as dust from entering the gap between the rotor 4 and the stator winding 2. When the protective cover plates 9,9 'are assembled to the frame 3, the width of the gap between the protective cover plates 9,9' and the brake wheel 11 is adjusted with respect to the rotating brake wheel 11 of the hoisting machine 1 such that the width is sufficiently small, preferably below 1 mm. It is noted that this mounting of the frame 3 is not necessary, and in another embodiment the protective cover plates 9,9' may directly cover the gap in the circumferential direction.

As best shown in fig. 4, the body of the protective cover 9,9' is formed as a circular plate. After the protective cover plates 9,9' are fitted in place, the body extends in a plane perpendicular to the axis of rotation 6, as shown in fig. 1. The protective cover 9,9' may be assembled from two parts, each formed in a semi-circular shape.

Fig. 2 is a schematic cross-sectional view of a protective cover 9,9' with a vent hole 12 in fluid communication with the gap to allow air to enter the gap from the vent hole 12, preferably the vent hole 12 has a width of 1mm or less, conforming to an IP rating 42 of particle and/or water drop protection, which is typically required for elevator hoists under severe conditions. The shape of the vent hole 12 is not limited, and may be, for example, a round hole, a long hole, a circular arc hole, or the like. Since the protective cover 9,9' has ventilation holes 12, air can enter the gap via the ventilation holes 12, thereby cooling the motor. Thus, for the elevator hoisting machine 1, the IP level can be raised while achieving a cooling effect. For example, in some embodiments, IP level 42 and energy level 1 may be implemented.

Since the protective cover 9,9 'is modular, no modification of the high-capacity elevator hoisting machine with IP grade 21 is required, and only by adding the protective cover 9,9', a low-capacity elevator with IP grade 42 can be obtained.

Preferably, the protective cover 9,9 'further comprises a water-repellent part 10 configured to guide water droplets, the water-repellent part 10 protruding obliquely downwards from the upper part of the protective cover 9,9' away from the gap, as shown in fig. 2, so that water droplets flow away from the vent hole 12 so as not to enter the gap. The waterproof part 10 prevents dripping to achieve IPX2 drip protection. The waterproof portion 10 may be integrally formed with the body of the protective cover 9, 9'. The waterproof portion 10 has, for example, a circular arc-shaped cross section.

While the exemplary embodiments of the hoist as set forth herein have been described in detail with reference to the preferred embodiments, it will be appreciated by those skilled in the art that numerous variations and modifications may be made to the specific embodiments described above without departing from the spirit of the utility model, and that numerous combinations of the various features and structures as set forth herein may be made without departing from the scope of the utility model.

Claims

1. A hoist, comprising:

a frame (3);

-a stator winding (2) attached to the frame (3);

-a rotor (4), the rotor (4) being configured to rotate about a rotation axis (6), facing and spaced apart from the stator winding (2) along the rotation axis to form a gap between the rotor (4) and the stator winding (2); and

a traction sheave (7), said rotor (4) being connected or integrated to said traction sheave (7),

characterized in that the hoisting machine further comprises a protective cover plate (9, 9 '), which protective cover plate (9, 9 ') is fixed to the frame (3) and is configured to prevent access to the gap, which protective cover plate (9, 9 ') comprises a vent hole (12) in fluid communication with the gap.

2. Hoisting machine according to claim 1, characterized in that the body of the protective cover plate (9, 9 ') is formed as a circular plate, which body extends in a plane perpendicular to the rotation axis (6) after the protective cover plate (9, 9') has been fitted in place.

3. The hoisting machine as claimed in claim 2, characterized in that,

the traction sheave (7) comprising a brake wheel (11), at least a part of the brake wheel (11) being arranged radially outside the rotor (4),

the frame (3) comprises a mounting portion extending axially from the stator winding side to the rotor side radially outside the brake wheel (11), the mounting portion extending in the axial direction over a length such that it covers the gap at least in the circumferential direction and leaving a channel between the mounting portion and the brake wheel (11) in fluid communication with the gap, the protective cover plate (9, 9') covering the channel.

4. A hoisting machine as claimed in any one of claims 1-3, characterized in that the ventilation holes (12) are oriented in the axial direction.

5. A hoisting machine as claimed in any one of claims 1-3, characterized in that the ventilation holes (12) have a width equal to or smaller than 1 mm.

6. A hoisting machine as claimed in any one of claims 1-3, characterized in that the protective cover plate (9, 9') is assembled from two parts.

7. A hoisting machine as claimed in any one of claims 1-3, characterized in that the protective cover plate (9, 9 ') further comprises a water-repellent part (10) configured to guide water droplets, which water-repellent part (10) protrudes obliquely downwards from the upper part of the protective cover plate (9, 9') away from the gap.

8. Hoisting machine according to claim 7, characterized in that the waterproof part (10) is formed integrally with the body of the protective cover (9, 9').

9. Hoisting machine according to claim 8, characterized in that the flashing (10) has a circular arc-shaped cross-section.

10. Elevator comprising a hoisting machine according to any one of claims 1-8.