JP2007001714A - Hoisting machine for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hoisting machine for an elevator capable of being lifted despite a large capacity one upon being divided easily and admitting easy maintenance, for example replacement of a driving sheave etc., likely to become a large scale operation. <P>SOLUTION: The hoisting machine for elevator is equipped with a stator core 3 having a plurality of core tooth parts arranged at a constant spacing circumferentially and split in two up and down about the axis, a stator housing 13 to hold the stator core and split in two up and down about the axis, a bearing table 4 installed confronting the stator housing and split in two up and down about the axis, a stator coil 5 inserted into the core tooth parts and split in two up and down about the axis, a rotor 17 in which a plurality of permanent magnets 10 are installed at a constant spacing at the periphery confronting the core tooth parts, and an up-and-down fixing device 6 installed on two sides of the stator housing and on the two sides of the bearing table for coupling together the stator housing halves upper and lower and also the bearing table halves with each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an elevator hoisting machine in consideration of maintainability and installation.

  Conventionally, in a high-speed and large-capacity elevator hoisting machine that is applied to a high-lift hoistway, in consideration of maintainability such as replacement of a driving sheave, an elevator installation site is not required. There has been proposed a drive sheave that can be easily replaced (see, for example, Patent Document 1). The stator is divided into an upper stator module and a lower stator module. The lower stator module is arranged so as to be separated from the traction pulley in the axial direction, and the rotor is integrally connected to the traction pulley. Have been proposed (see, for example, Patent Document 2).

JP 2004-1007048 A JP 2000-201462 A

In the conventional elevator hoist described in Patent Document 1, since fixed portions such as a stator housing, a stator core, a stator coil, and a phase ring are incorporated in a single circle, When replacing the drive sheave, when disassembling / assembling, a maintenance space for moving the rotating body composed of the shaft, the drive sheave and other parts in the axial direction to a position where it does not interfere with the fixed part is necessary. We had to fully consider the equipment layout in the machine room. Furthermore, since the fastener on the rotating side transmits axial force, the size must be increased and the number of the fasteners must be increased in order to obtain a fastener with an increased mechanical strength safety factor. did not become.
Further, in the conventional elevator hoist described in Patent Document 2, when splitting and lifting, or when replacing a driving sheave, the stator module divided into two parts is divided into two parts vertically when disassembling and assembling. However, there is no disclosure of a configuration in which the rotor in which the stator and the permanent magnet are arranged is divided without contacting, and the stator and the permanent magnet are caused by a very large magnetic attraction force of the permanent magnet that forms the field pole. There is a possibility that the rotor which arranges may be damaged by contact. Also, a large-scale device is required to divide the stator and the rotor where the permanent magnets are placed so that they do not come into contact with each other. When dividing and lifting at the site where the elevator is installed or when replacing the driving sheave,・ Assembly itself is not easy and extremely difficult.

  The present invention has been made to solve the above-described problems, and can be easily divided and lifted even by a large capacity hoisting machine having a large physique, and maintenance that becomes a major factor such as replacement of a driving sheave It is an object of the present invention to provide an elevator hoisting machine that can be easily assembled and disassembled with high reliability and good workability without contact between a stator and a rotor on which permanent magnets are arranged.

In the elevator hoisting machine according to the present invention, a stator core having a plurality of core teeth arranged circumferentially at equal intervals and divided into two vertically on the axis center, and the stator core A stator housing that is divided into two vertically on the axis center, a bearing base that is provided facing the stator housing and is divided into two vertically on the axis center, and is inserted into the core tooth portion. A stator coil divided into two vertically on the center of the shaft, a rotor having a plurality of permanent magnets arranged at equal intervals on the outer periphery facing the core teeth, and both sides of the stator housing and the bearing stand It is provided with an upper and lower fixing device that is provided on each of both sides and that connects the stator housing and the bearing stand that are divided into upper and lower portions.

  According to the present invention, since the stator including the stator housing and the bearing stand are divided into two vertically on the shaft center, the upper and lower fixing devices for connecting the upper and lower portions installed on the side surfaces are tightened and removed. Even a hoisting machine with a large physique can be easily divided and lifted with a small capacity lifting machine. In addition, since the installation time is shortened and the workability is good, a hoisting machine with high safety and easy quality assurance can be obtained. In addition, since the structure can be divided, maintenance that becomes a major part such as replacement of the drive sheave can also reduce the maintenance space, and the workability of division and reassembly can be easily performed, so the safety is high and the quality is high. A hoisting machine that can be easily secured can be obtained.

Embodiment 1.
1 is a front view showing an elevator hoisting machine according to Embodiment 1 of the present invention, FIG. 2 is a side view showing the elevator hoisting machine according to Embodiment 1 of the present invention in a partial cross section, and FIG. FIG. 4 is a front view showing the division work status of the elevator hoisting machine according to Embodiment 1 of the present invention, FIG. 4 is a side view showing the division work situation of the elevator hoisting machine according to Embodiment 1 of the present invention, and FIG. FIG. 6 is a front view showing the stator housing, FIG. 6 is a schematic view showing the connection of the stator coil and the phase ring of the elevator hoisting machine according to Embodiment 1 of the present invention, and FIG. 7 is for the elevator according to Embodiment 1 of the present invention. It is explanatory drawing which shows the fixing method between the stator core and stator housing of a winding machine.

  In the figure, 1 is a bed, 13 is a stator housing also serving as a bearing stand provided on one end side of the bed 1, and is divided into an upper stator housing 13a and a lower stator housing 13b which are divided into two vertically on the axis center. It is configured. In the upper and lower stator housings 13a and 13b, the stator core 3 stacked on the inner peripheral surface is mounted with a stator core fixing bolt 26. Reference numeral 4 denotes a bearing base provided on the other end side of the bed 1 so as to face the stator housing 13, and is composed of an upper bearing base 4a and a lower bearing base 4b which are divided into two vertically on the axis center. Reference numeral 14 denotes a shaft whose longitudinal end is detachably pivotally attached to the stator housing 13 by a bearing 7a, and an end on the side opposite to the stator housing 13 is pivotally attached to the bearing base 4 by a bearing 7b. A drive sheave 17 fixed between the stator housing 13 and the bearing stand 4 and a rotor 17 extended to the stator housing 13 side of the drive sheave 15 are arranged on the outer peripheral surface of the stator sheave. A permanent magnet 10 that is opposed to the core 3 and that constitutes the electric motor by the stator core 3 is provided. The upper and lower stator housings 13a and 13b are fixed at the upper and lower sides including the fastening bolts 2 for fastening the upper and lower stator housings 13a and 13b to the horizontal flange portions on both side surfaces facing each other. A device 6 is installed. Similarly, the horizontal flanges on the opposite side surfaces of the upper and lower bearing bases 4a and 4b include the fastening bolts 2 for fastening the upper and lower bearing bases 4a and 4b between the upper and lower sides. A fixing device 6 is installed. Further, when the stator housings 13a and 13b are divided into upper and lower parts, even if the fastening bolts 2 are removed, the stator including the divided upper stator housing 13a does not come into contact with the permanent magnets 10 due to the attractive force of the permanent magnets 10. There is provided a guide device 24 comprising a rod-like fixed guide tool. The guide device 24 is inserted through the mounting hole of the upper and lower fixing device 6 of the stator housing 13, and the lower end portion thereof is fixed to the bed 1 with a screw or the like and is detachable. Similarly, in order to prevent the rotor 17 portion from coming into contact with the stator by the attractive force of the permanent magnet 10, a jack function that can arbitrarily move in the vertical direction as a structure that can fix the shaft end portion of the rotor 17 is possible. The attached rotor guide device 25 is provided. The rotor guide device 25 is also detachable.

  As shown in FIG. 5, the stator housing 13 is divided into an upper housing 13 a and a lower housing 13 b in an upper and lower part, and an upper stator and a lower stator are divided into an upper part and a lower part. The stator has a plurality of core teeth arranged in a cylindrical shape at equal intervals, the stator core 3 divided into two vertically on the axis center, and concentratedly wound around each of the core teeth, and the axis center It consists of a stator coil that is divided into two parts in the upper and lower directions and connected in three phases (U, V, and W phases) and a phase ring conductor that is divided into two parts in the upper and lower parts on the axis center and connected individually. ing. As shown in FIG. 6, the coil wire of each phase is connected to the phase ring 8 of each phase, and the phase ring 8 is connected in common to all phases with one of the coil wires of each phase being a neutral point. The other is connected to each U, V, and W phase. And the connection of said phase ring 8 is wired independently for every stator divided into two up and down. The phase ring 8 is arranged circumferentially adjacent to the stator core 3 in the axial direction, and constitutes an electric circuit together with the stator coil 5.

In the elevator hoisting machine configured as described above, when it is installed in the machine room arranged at the upper part of the building, it is a large capacity machine, so its physique is large. In order to reduce the weight as much as possible in consideration of the operability of lifting, a method of disassembling and lifting is adopted, and reassembly is performed in the machine room. In addition, during commercial operation, it is necessary to replace the sheave or the bearing due to wear or the like when the sheave groove of the drive sheave exceeds a predetermined value.
In such a case, the removal work is performed as follows.
That is, the lead wire 23 of the stator coil 5 is removed from the terminal block (not shown) so as not to be restrained. Moreover, the fastening bolt 2 of the up-and-down fixing device 6 installed on both sides of the stator housing 13 and the fastening bolt 2 of the up-and-down fixing device 6 installed on both sides of the bearing base 4 are loosened, removed, and removed. Next, the upper bearing base 4a of the bearing base 4 is removed and temporarily placed in the maintenance space of the machine room. Next, a guide device 24 composed of a rod-shaped fixed guide is inserted through the mounting hole of the upper and lower fixing device 6 of the stator housing 13, and the lower end portion is detachably screwed and fixed to the bed 1 (or the lower stator housing). To do. In order to prevent the permanent magnet 10 from coming into contact with the permanent magnet due to the attraction force of the permanent magnet 10, the upper stator housing 13 a is moved while the mounting holes of the upper and lower fixing devices 6 of the upper stator housing 13 a are engaged along the guide device 24. Pull it up and temporarily place it in the maintenance space of the machine room. Thus, the upper part of the axial center position horizontal plane of the hoisting machine that becomes an obstacle to lift the rotating part upward is completely removed. Next, the rotor guide device 25 is installed on the bed 1, and the upper end of the rotor guide device 25 is fixed to the shaft end of the rotor 17, and the rotating portion including the shaft 14, the drive sheave 15, the rotor 17, and the bearing 7 (the bearing is The outer ring on the fixed side is lifted upward while protecting it from coming into contact with the lower stator housing 13b with a lifting machine such as a crane.

  As a result, when disassembling and reassembling at the elevator installation site, the weight of the lifted parts is reduced, so it is possible to handle even a crane with a small capacity, and the ease of installation of the hoist (workability, work time) ) Can be greatly improved. Further, since a large-scale device corresponding to the attractive force by the permanent magnet 10 is not required, and no maintenance space for moving the rotating portion in the axial direction to a position where the rotating portion does not interfere with the fixed portion, no maintenance is required. An excellent hoisting machine can be provided. The guide device 24 is configured to guide the mounting hole of the upper and lower fixing device 6 of the stator housing 13. However, the guide device 24 is not limited to this. For example, when the stator housing 13 is lifted, a guide with a guide is provided. It can be lifted with a crane, and anything that can be guided is acceptable. Similarly, the rotor guide device 25 may be lifted by a crane with a guide. It should be noted that, when reassembly is performed, the same effect can be obtained because the work is performed in the reverse process of the above-described removal work.

  According to the configuration of the first embodiment, since the stator and the bearing stand including the stator housing are divided into two vertically on the axis center, the upper and lower spaces formed by the fastening bolts connecting the upper and lower portions installed on the side surfaces By tightening and removing the fixing device, even a hoisting machine with a large physique can be easily divided and lifted with a lifting machine with a small capacity, and the installation time is shortened and workability is good, so safety is improved. A hoisting machine that is high in quality and easy to ensure quality can be obtained. In addition, since the above-described divided structure can be used, maintenance that becomes a large-scale operation such as replacement of the drive sheave can also reduce the maintenance space, and the workability of division / reassembly can be easily performed. It is possible to obtain a hoisting machine that is easy to secure quality.

Embodiment 2.
FIG. 8 is a circuit diagram showing a power circuit configuration of an elevator hoist according to Embodiment 2 of the present invention.
In an elevator hoisting machine such as a high-speed and large-capacity motor, the electric motor has a large capacity while the power source has a large capacity. A large-capacity power supply generally includes a large number of inverter elements in parallel for each phase. As the number of parallel circuits increases, it is necessary to greatly increase the margin of current imbalance of each inverter element. Therefore, it is necessary to configure the power source with an inverter element having a large capacity in consideration of the current unbalance amount. As a result, the power source has a large capacity relative to the capacity of the electric motor, which is uneconomical.
Therefore, with respect to the elevator hoisting machine in the first embodiment, two or more independent power sources 27 in which the electric circuit of the hoisting machine including the stator coil as shown in FIG. 28 are connected to each other. The plurality of power supplies 27 and 28 can use a general-purpose power supply with a small capacity. With a small capacity power supply, the current unbalance margin of each inverter element can be expected to be small, so the number of inverter elements in parallel is small. Therefore, it can be configured with an inverter element having a capacity suitable for the capacity of the electric motor, and can be used as a drive power source for an inexpensive and large capacity hoisting machine.

1 is a front view showing an elevator hoist according to Embodiment 1 of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a partial cross section of an elevator hoist according to Embodiment 1 of the present invention. It is a front view which shows the division | segmentation operation | work condition of the elevator hoisting machine in Embodiment 1 of this invention. It is a side view which shows the division | segmentation operation | work condition of the elevator hoisting machine in Embodiment 1 of this invention. It is a front view which shows a stator housing. It is a schematic diagram which shows the connection of the stator coil and phase ring of the elevator hoisting machine in Embodiment 1 of this invention. It is explanatory drawing which shows the fixing method between the stator core and stator housing of the elevator hoist in Embodiment 1 of this invention. It is a circuit diagram which shows the power supply circuit structure of the winding machine for elevators in Embodiment 2 of this invention.

Explanation of symbols

1 Bed 2 Clamping bolt 3 Stator core 4 Bearing base 4a Upper bearing base 4b Lower bearing base 5 Stator coil 6 Vertical fixing device 7a, 7b Bearing 8 Phase ring 10 Permanent magnet 13 Stator housing 13a Upper stator housing 13b Lower stator housing 14 Shaft 15 Drive sheave 17 Rotor 23 Stator coil lead wire 24 Guide device 25 Rotor guide device 26 Stator core fixing bolts 27, 28 Multiple power sources

Claims (7)

A stator core having a plurality of core teeth arranged circumferentially at equal intervals and divided into two vertically on the axis center;
A stator housing that holds the stator core and is divided into two vertically on the axis center;
A bearing stand provided opposite to the stator housing and divided into two vertically on the axis center;
A stator coil inserted into the core tooth portion and divided into two vertically on the axis center;
A rotor in which a plurality of permanent magnets are arranged at equal intervals on the outer peripheral portion facing the core tooth portion;
An upper-lower fixing device that is provided on both sides of the stator housing and both sides of the bearing base, and connects between the stator housing and the bearing base that are divided vertically;
An elevator hoisting machine characterized by comprising: A stator core having a plurality of core teeth arranged circumferentially at equal intervals and divided into two vertically on the axis center;
A stator housing that holds the stator core and is divided into two vertically on the axis center;
A bearing stand provided opposite to the stator housing and divided into two vertically on the axis center;
A stator coil inserted into the core tooth portion and divided into two vertically on the axis center;
A rotor in which a plurality of permanent magnets are arranged at equal intervals on the outer peripheral portion facing the core tooth portion;
An upper-lower fixing device that is provided on both sides of the stator housing and both sides of the bearing base, and connects between the stator housing and the bearing base that are divided vertically;
A guide device for preventing a stator including a divided upper stator housing from coming into contact with the permanent magnet by an attractive force of the permanent magnet;
An elevator hoisting machine characterized by comprising: The guide device is composed of a rod-shaped fixed guide provided detachably and an attachment hole provided in an up-and-down fixing device through which the rod-shaped fixed guide is inserted. The elevator hoist according to 2. A stator core having a plurality of core teeth arranged circumferentially at equal intervals and divided into two vertically on the axis center;
A stator housing that holds the stator core and is divided into two vertically on the axis center;
A bearing stand provided opposite to the stator housing and divided into two vertically on the axis center;
A stator coil inserted into the core tooth portion and divided into two vertically on the axis center;
A rotor in which a plurality of permanent magnets are arranged at equal intervals on the outer peripheral portion facing the core tooth portion;
An upper-lower fixing device that is provided on both sides of the stator housing and both sides of the bearing base, and connects between the stator housing and the bearing base that are divided vertically;
A guide device for preventing a stator including a divided upper stator housing from coming into contact with the permanent magnet by an attractive force of the permanent magnet;
A rotor guide device for preventing the rotor from coming into contact with the stator by the attractive force of the permanent magnet;
An elevator hoisting machine characterized by comprising:   5. The elevator hoisting machine according to claim 4, wherein the rotor guide device is detachably provided, has a jack function that can fix the shaft end portion of the rotor and can move only in the vertical direction. .   The stator coil is concentrated winding, and the stator housing, stator core, stator coil, and phase ring are divided into two parts independently of each other, and the rotor can be inserted and removed in the upward direction. The elevator hoist according to any one of claims 1 to 5. The electric circuit of the motor for hoisting machines including the stator coil is disposed independently in the upper and lower sides, and is connected to two or more independent general-purpose power sources, respectively. An elevator hoist according to claim 1.

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