Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1996-11-12
1999-11-09
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310268, 310261, 310254, 187250, 187254, 187277, H02K 122
Patent
active
059820608
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an elevator motor and to an elevator machinery in which the stator disc includes a generally annular cavity, an open side of which is directed toward the rotor disc, and an annular sealing is provided between the rotor disc and a wall of the cavity.
The physical dimensions of an elevator machinery affect the size of the elevator shaft and/or the building itself, depending on where the machinery is located. When the machinery is placed in or beside the elevator shaft or in a machine room, the thickness of the machinery is of essential importance with respect to the space required.
An elevator machinery can also be implemented using a disc-type motor, e.g. like the elevator motor presented in FIG. 8 of patent publication U.S. Pat. No. 5,018,603. The motors described in this publication are clearly more compact and flatter in the lengthwise direction of the motor shaft than conventional geared elevator machineries. However, the machineries presented in the publication are clearly designed for installation in a machine room. The rotor structure in these elevator machineries consists of a separate iron packet attached to the rotor disc, the windings being placed in the iron packet.
Previously known elevator machineries using a disc-type motor have the drawback that detrimental particles, such as ferromagnetic dust, may gather from the air in the space of the stator and rotor windings.
The object of the present invention is to produce a new solution for a disc-type motor of an elevator machinery, designed to prevent detrimental particles from getting into the winding space of the motor. A further object of the invention is to produce a new type of elevator machinery, in which an elevator motor as provided by the invention is integrated with the elevator machinery so as to form a single part with it.
The invention provides a way to block the entry of detrimental particles into the winding space of a disc-type elevator motor, thus ensuring that the winding space remains clean and permitting longer maintenance intervals of the motor.
The elevator motor of the invention uses a simple sealing structure. The stator disc can be provided with an integrated sealing area during manufacture, thereby reducing the manufacturing costs. The sealing can be implemented using any of the commonest seal types based on a sliding sealing function, such as a felt seal, a lap seal or a brush seal. It is also possible to use labyrinth or combination sealing. Providing an elevator motor with a sealing as provided by the invention is useful in all disc-type elevator motors and very useful in elevator motors in which rotor excitation is implemented using permanent magnets attached to the rotor disc.
In the elevator machinery of the invention, the elevator motor is integrated as a part of the elevator machinery so as to produce a very flat and compact machinery. Actually one cannot directly tell which part of the assembly belongs to the elevator machinery and which part belongs to the elevator motor, because in fact the elevator machinery is built around the elevator motor. The elevator machinery is suited for installation in a machine room, in the counterweight of the elevator or in the elevator shaft.
The invention is described by the aid of two embodiments, in which
FIG. 1 presents an elevator machinery according to the invention, seen from the direction of the shaft,
FIG. 2 presents an elevator machinery with a motor employing a sealing system according to the invention, and
FIG. 3 presents another elevator machinery implemented according to the invention.
FIG. 1 shows a front view of a gearless elevator machinery 1 according to the invention, comprising a disc-type elevator motor 2, a disc brake 3 and a traction sheave 4. The elevator ropes 5 are passed around the traction sheave 4. The elevator machinery is held together by fixing elements 8 placed between lugs 7 provided in the stator disc 18 and in the support 6 attached to it. In addition, another fixing element 10 is provided in the central part of
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Aulanko Esko
Hakala Harri
Mustalahti Jorma
Kone OY
Mullins B.
Ramirez Nestor
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