JP2013147322A - Elevator winding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an elevator winding machine that can improve a cooling effect on a bearing of a winding machine so that a fin is tilted backward to each direction which is a normal rotation direction and a reverse direction of the winding machine by varying the angle of the fin according to a rotation direction of the winding machine.SOLUTION: An elevator winding machine includes: a frame body fixed on a fixation side; a rope pulley that is rotatably supported by rope pulley rotation shaft provided in the frame body and where a rope is wound; a plurality of fins that are formed on the side surface part of the rope pulley, are radially disposed in an opening part formed like a ring in a peripheral direction on the rotation shaft side of the rope pulley and are each supported to be rotatable in a circumferential direction on a plurality of fin rotation shafts provided either an outer circumferential side or an inner circumferential side of the opening part; a partition plate that is fixed to the rope pulley and faces apart from a closed surface of the opening part; and a guide that is provided in either the rope pulley or the partition plate, contacts with the fins and suppresses the rotation of the fins.

Description

The present invention relates to an elevator hoisting machine having a cooling structure for cooling a bearing portion.

  In general, when the number of rotations of an elevator hoisting machine increases, the temperature of the bearing that rotates and slides rises, so that the grease enclosed in the bearing tends to deteriorate. For this reason, there is a problem that the replacement frequency of the grease is increased and the maintenance cost is increased.

  In order to solve the above problem, conventionally, as a method of cooling the hoisting machine, a method of cooling the hoisting machine by disposing an electric cooling fan on the frame and providing an air passage is used (for example, see Patent Document 1).

  As a method of cooling the bearing of the hoisting machine, a blower fan provided with a plurality of blade pieces radially is attached to the rotating shaft of the hoisting machine, and the outer periphery of the electric motor is cooled by the rotation of the rotating shaft. There is a method of cooling the bearing and the bearing bracket (for example, see Patent Document 2).

JP 2008-187792 A (paragraphs 0026 to 0031 and FIG. 1) JP 2010-126325 A (paragraphs 0012 to 0016 and FIG. 1)

  However, in the method of Patent Document 1, in the case where an electric fan is disposed, not only the bearing but also the entire casing and stator coil of the hoisting machine are often cooled, and only the bearing is effectively cooled. It is difficult. In addition, there are problems that the manufacturing cost is high and the power consumption of the fan increases.

  In addition, as in the method of Patent Document 2, it is difficult to increase the wind speed on the surface of the bracket simply by disposing a fan on the inner peripheral side of the sheave. Therefore, the bearing of the hoisting machine is efficiently cooled. There is a problem that can not be.

  The present invention has been made to solve the above-described problems. By making the angle of the fins variable in accordance with the rotation direction of the hoisting machine, the forward direction and the reverse direction of the hoisting machine are improved. It is an object of the present invention to provide an elevator hoisting machine in which fins can be disposed so as to incline backward with respect to the respective directions, and the air volume given to the bearing of the hoisting machine is large and the cooling effect can be improved.

  An elevator hoisting machine according to the present invention includes a frame fixed to a fixed side, a sheave rotatably supported by a sheave rotation shaft provided on the frame, and a rope wound around the sheave. A plurality of fin rotation shafts provided on the outer peripheral side or the inner peripheral side of the opening portion are arranged radially on the opening portion formed in the ring shape in the circumferential direction on the sheave rotation shaft side and formed on the side surface portion. A plurality of fins supported so as to be rotatable in the circumferential direction, a partition plate fixed to the sheave, facing the closed surface of the opening with a gap, and provided on the sheave or the partition plate, in contact with the fin And a guide for suppressing the rotation of the fin.

According to the elevator hoisting machine according to the present invention, by making the angle of the fins variable according to the rotation direction of the hoisting machine, the forward rotation direction and the reverse rotation direction of the hoisting machine, The fins can be arranged so as to incline backward, and the air volume given to the bearing of the hoisting machine is large, and the cooling effect can be improved.

It is a schematic diagram of the cross section of the winding machine by Embodiment 1 of this invention. It is a schematic diagram of the cross section of another winding machine by Embodiment 1 of this invention. It is a schematic diagram of the cross section of another winding machine by Embodiment 1 of this invention. It is a schematic diagram of the cross section of the winding machine by Embodiment 2 of this invention. It is a schematic diagram of the movable fin by Embodiment 2 of this invention. It is a schematic diagram of another movable fin by Embodiment 2 of this invention. It is a schematic diagram of the movable fin by Embodiment 3 of this invention.

Embodiment 1 FIG.
Hereinafter, the elevator hoist according to the first embodiment will be described with reference to the drawings. FIG. 1 (a) is a diagram schematically showing a cross section of an elevator hoist according to Embodiment 1 of the present invention. Moreover, FIG.1 (b) is AA sectional drawing of the winding machine shown to Fig.1 (a). In FIG. 1, a hoisting machine 20 includes a hoisting machine housing 1, a hoisting machine shaft 2, a bearing 3 provided around the shaft, a sheave 4 that rotates in the forward and reverse directions around the shaft, The stator 5 around which the coil is wound, the permanent magnet 6 provided on the outer peripheral surface of the sheave, the cover 7 fixed to the side surface (axial end surface) of the sheave, and the axial end of the sheave An air passage forming unit 21 is provided. The housing 1, the shaft 2, and the stator 5 are fixed to the fixed side, and the sheave 4, the permanent magnet 6, and the air path forming portion 21 rotate around the shaft 2.

  A shaft 2 is fixed to the housing 1 (frame body) of the hoisting machine, and the shaft 2 (the sheave rotation shaft) supports the sheave 4 through a bearing 3 provided around the shaft 2. A stator 5 around which a coil is wound is fixed to the housing 1, and a permanent magnet 6 of the sheave 4 is disposed on the opposite surface. The sheave 4 includes a body portion 22 having a rope groove 4 a around which a rope is wound, and a cylindrical rotor 23 that is formed concentrically with the body portion 22 and has a larger diameter than the body portion 22. The permanent magnet 6 is fixed to the upper part. Further, a cover 7 is fixed to an end portion of the sheave 4 on the bearing side, and grease that is a lubricant for the bearing 3 is sealed.

  The air passage forming unit 21 restricts the movement of the movable fins 8, the plurality of fin rotation shafts 9 for moving the movable fins, the partition plate 10 for forming the air passage, and the movable fins. It consists of a plurality of guides 11. Further, the air passage forming portion 21 is formed in a ring-shaped opening provided in a side surface portion that is an axial end portion of the body portion 22 of the sheave and provided in a circumferential direction of the body portion 22. That is, the opening is provided by processing the side surface of the body portion 22 of the sheave into a circular groove shape.

  The movable fins 8 enhance the air blowing function, and are arranged inside the opening of the body portion 22 of the sheave, and a plurality of movable fins 8 are provided radially from the inner peripheral side to the outer peripheral side of the opening. The fin rotation shaft 9 is a shaft for rotatably supporting the movable fin 8, is fixed to the inner peripheral side that is the bearing side of the opening of the body portion 22, and is disposed in parallel with the shaft 2. Further, the movable fin 8 is formed with a hole so that the fin rotation shaft 9 can rotatably support the movable fin 8, and the fin rotation shaft 9 passed through the movable fin 8 is fixed to the opening of the body portion 22. Is done. Further, as shown in FIG. 1B, the movable fin 8 has a linear cross-sectional shape and is processed into a shape in which the outer peripheral side swells more than the inner peripheral side so that the center of gravity is biased toward the outer peripheral side of the opening.

  The partition plate 10 is a disc-like plate that covers the opening of the body portion 22 with a gap, and is fixed to the body portion 22 of the sheave 4 via the fin rotation shaft 9. Further, by providing a gap between the partition plate 10 and the closed surface of the opening, an air inlet is formed in the opening to form an air passage. In addition, the partition plate 10 covers not only the opening portion of the body portion 22 but also the axial end surface of the body portion 22 with a gap. That is, the partition plate 10 is arranged to extend to the outer peripheral side of the body portion 22.

  The guide 11 is fixed to the opening of the body portion 22 of the sheave and is disposed in parallel with the fin rotation shaft 9. Further, the guide 11 is arranged on the outer peripheral side of the fin rotation shaft 9 and is arranged between the plurality of radially arranged movable fins 8, and comes into contact with the movable fins 8 to rotate the movable fins 8 in the clockwise direction. The movable range, which is the range in which the movable fin moves, is determined by suppressing the rotation and the counterclockwise rotation.

Next, the operation of the hoisting machine 20 shown in FIGS. 1 (a) and 1 (b) will be described.
A plurality of ropes are wound around a rope groove 4a provided in the body portion 22 of the sheave 4, and a carriage and a canter weight are fixed to both ends of the rope. A rotating magnetic field is generated by energizing the coil wound around the stator 5 to rotate the sheave 4 to which the permanent magnet 6 is fixed, and the car and the counterweight are moved up and down relatively in the opposite direction.

  Since the movable fins 8 are disposed in the opening of the body part 2 and the partition plate 10 is disposed with a gap with respect to the closing surface of the opening part of the body part 2, when the sheave 4 rotates, FIG. As shown by a solid line arrow, air flows from the air inlet formed by the partition plate 10 and the body part 22 on the inner peripheral side of the body part 22 into the opening. Then, air flows along the movable fin 8 toward the outer peripheral side of the opening, and the air is discharged from the outer air outlet formed by the partition plate 10 and the body part 22. When the partition plate 10 is not attached, the amount of air passing through the opening is small, and efficient cooling cannot be expected, but by arranging the partition plate 10, the air blowing function as a fan of fins is exhibited, High cooling performance can be obtained.

  The movable fin 8 is rotatably supported by a fin rotation shaft 9 fixed to the inner peripheral side of the body portion 22 and is processed into a shape that swells to the outer peripheral side so that the center of gravity is biased to the outer peripheral side. As shown by a dotted line in FIG. 1B, for example, when the sheave 4 rotates in the clockwise direction, the movable fin 8 is inclined by a predetermined angle in the counterclockwise direction around the fin rotation shaft 9 due to inertial force. The wind can be efficiently sent to the outer peripheral side. On the other hand, when the sheave 4 rotates in the counterclockwise direction, the movable fin 8 is tilted clockwise by a predetermined angle about the fin rotation shaft 9 by the inertial force due to the rotation of the sheave 4. The inclination angle of the movable fin 8 with respect to the circumferential direction of the sheave 4 is regulated by guides 11 disposed on both sides of the fin in the circumferential direction. When the sheave 4 rotates in the clockwise direction, each of the plurality of movable fins 8 is disposed in the rearward direction with respect to the rotation direction of the sheave 4 by tilting in the counterclockwise direction. When it passes, it becomes easy to flow to the outer peripheral direction of the sheave 4, and the airflow which flows from the inner peripheral side of the sheave 4 to the outer peripheral side can be increased. Further, if the inertial force of the movable fin 8 is made larger than the gravity of the movable fin 8, all the movable fins 8 are set at the same angle when the sheave rotates regardless of the initial position of the movable fin 8. Be placed.

  Usually, when the rotation direction is not one direction, the fins are often arranged at equal intervals in parallel to the radial direction so that there is no difference in the air volume between the forward rotation and the reverse rotation. As in the present invention, by disposing the fins so as to move rearward with respect to the rotation direction, the air volume can be increased as compared with the conventional case and the cooling effect can be enhanced.

  As described above, according to the elevator hoisting machine of the first embodiment, the opening of the body portion 22 of the sheave 4 is movable so as to be rotatable by a predetermined angle in the direction opposite to the rotation direction of the sheave 4. Since the fins 8 are provided and the partition plate 10 is provided so as to face the closing surface of the opening of the body 22, the amount of air flowing through the opening of the body 22 can be increased, and the sheave of the hoist 20 The temperature rise of the bearing when 4 rotates in the clockwise direction and the counterclockwise direction can be more effectively suppressed than in the past in both directions.

  In addition, when the temperature rise of the bearing 3 of the hoisting machine 20 increases, the grease used as the lubricating oil of the bearing deteriorates. However, by cooling the bearing portion, the grease deterioration is suppressed and the grease replacement frequency is reduced. Since it can be reduced, maintenance costs can be reduced.

  Moreover, since the bearing can have a long life by suppressing the temperature rise of the bearing 3 of the hoisting machine 20, the long-term reliability of the hoisting machine can be improved.

Moreover, by arranging fins having a blowing function in the opening of the sheave 4 and forming an air passage with a partition plate, the wind is efficiently sent from the inner periphery side to the outer periphery side of the sheave effectively. Since the hoisting machine 20 can be cooled, it is not necessary to cool the hoisting machine from the outside, and a cooling structure can be realized at low cost. In addition, since no additional power is required, the power consumption of the hoisting machine can be reduced.

  In the above description, the partition plate 10 has been described as a disc shape. However, for example, the radius of the inner peripheral side of the movable fin 8 is small, the inner peripheral side of the body portion 22, and the opening portion of the body portion 22. When a sufficient gap (wind inlet side) formed by the partition plate 10 cannot be secured, the pressure loss of the wind blown into the opening of the body portion 22 becomes large. In this case, as shown in FIG. 2, the pressure loss can be reduced by bending the inner diameter side of the partition plate 10 to the side opposite to the opening to form a curved shape like a bell mouth shape.

  In this way, by forming a bell mouth-shaped curved surface portion on the inner peripheral side end portion of the partition plate 10, pressure loss with the partition plate when the wind flows from the inner peripheral side to the outer peripheral side of the sheave 4 is reduced. Therefore, the cooling efficiency of the bearing portion can be increased and the reliability of the bearing portion can be improved.

  In the above description, the movable fin 8 is configured to be rotatably supported by the fin rotation shaft 9 fixed to the body portion 22 of the sheave 4. However, as shown in FIG. Even if 9 and the guide 11 are fixed, the same effect can be obtained. When fixing the fin rotation shaft 9 to the body portion 22 of the sheave 4, it is necessary to make holes in the body portion 22, and it is assumed that machining and assembly costs increase as the sheave 4 becomes larger. By arranging the fin rotation shaft 9 and the guide 11 on the side of the partition plate 10 which is smaller and lighter than the sheave 4, the manufacturing cost can be reduced. In the above description, an example in which a plurality of partition plates 10 are fixed to the fin rotation shaft 9 is shown. However, the present invention is not limited to this, and the partition plates 10 may be directly fixed to the sheave 4.

Embodiment 2. FIG.
In the first embodiment, the movable fin 8 has a size that fits within the opening of the trunk portion 22 in the radial direction of the trunk portion 22 of the sheave 4, but there is a margin in the axial dimension of the hoist 20. As shown in FIG. 4, the movable fin 8 may be extended from the inner peripheral side to the outer peripheral side. FIG. 4 is a schematic sectional view of a hoist according to Embodiment 2 of the present invention. In this case, a part of the movable fin 8 is disposed in a gap formed by the closing surface of the sheave 4 and the partition plate 10, and in the radial direction of the body portion 22, from the opening end of the body portion 22 to the outer peripheral side. It extends and is arranged. That is, a part of the movable fin 8 is arranged to extend further from the outer peripheral side end of the opening of the sheave 4 to the outer peripheral side of the sheave 4.

  As described above, by increasing the outermost peripheral diameter of the movable fin 8, the wind speed discharged to the outer peripheral side can be increased and the area of the fin can be increased. Can be increased.

  Further, since the movable fin 8 is extended from the end of the opening of the body portion 22 to the outer peripheral side and the outer peripheral side of the side surface of the body portion 22 is efficiently cooled, the rope groove 4 of the sheave 4 is formed by friction with the rope. The generated frictional heat can be efficiently absorbed and the vicinity of the rope groove 4 can be cooled.

  In addition, when the number of rotations of the hoisting machine is large, a cooling structure in which the number of fins is reduced can be applied, and the material used can be suppressed.

  In the first embodiment, the outer peripheral side of the movable fin 8 is wider than the inner peripheral side and the shape is swollen so that the center of gravity is on the outer peripheral side. However, the fins shown in FIGS. It may be used. FIG. 5 (a) is a side view of the movable fin according to the second embodiment of the present invention, and FIG. 5 (b) is a front view of the movable fin according to the second embodiment of the present invention. In FIG. 5, the adjustment hole 12 is provided on the inner peripheral side so that the inner peripheral side is lighter than the outer peripheral side, and the center of gravity is on the outer peripheral side. If the shape shown in FIG. 5 is applied, the movable fin 8 can be reduced in weight.

  In the first embodiment, the movable fin 8 has a substantially linear shape. However, in order to further increase the air flow, the movable fin 8 may have a streamlined shape as shown in FIGS. 6 (a) and 6 (b). it can. 6A is a schematic diagram of another movable fin according to Embodiment 2 of the present invention, and FIG. 6B is a schematic cross-sectional view of a hoisting machine using another movable fin. In FIG. 6, the movable fin 8 has a shape in which thin fins are opened on both sides of the guide 11. That is, the movable fins 8 extend in pairs from the fin rotation shaft 9 to the outer peripheral side, have a streamline shape in which air can easily flow from the inner peripheral side to the outer peripheral side of the movable fins, and There is a gap between them, and the guide 11 is arranged in the gap. The movable fin 8 is rotatably supported by a fin rotation shaft 9 provided at the streamline tip. A guide 11 is disposed on the outer peripheral side of the fin rotation shaft 9. Since the guide 11 is disposed inside the substantially U-shaped movable fin 8, when the movable fin 8 rotates in a direction opposite to the rotation of the hoisting machine 20 as the hoisting machine 20 rotates, the guide U is approximately U. It abuts against the guide 11 inside the character-shaped portion and stops relative to the sheave 4.

  As described above, according to the present embodiment, by applying the streamlined fin shape shown in FIG. 6A, for example, the sheave 4 is rotated clockwise as shown in FIG. 6B. Sometimes, the movable fin 8 tilts counterclockwise, that is, tilts backward (opposite direction) with respect to the rotational direction of the hoist 20, thereby suppressing the flow resistance at the fin and increasing the air volume. The temperature rise of the hoisting machine can be suppressed.

  Further, in a small hoisting machine with a small diameter of the sheave 4, the air volume may decrease due to the low rotation speed. However, as shown in FIG. 6, the shape of the movable fin 8 should be made substantially streamlined. Thus, a small hoist can be efficiently cooled.

Embodiment 3 FIG.
In the second embodiment, the air volume is increased by a streamlined movable fin, but there may be a case where a larger inclination angle than the streamlined movable fin 8 is required depending on the number of rotations and the size of the hoisting machine. there is a possibility. In order to increase the angle of the movable fin 8 with respect to the circumferential direction of the sheave 4, the air volume can be increased by forming a set of fins with a plurality of movable fins 8 as shown in FIG. 7. FIG. 7 is a schematic diagram of a movable fin according to the third embodiment of the present invention.

  As shown in FIG. 7, the movable fins 8 are radially arranged in a staggered manner in the circumferential direction on the outer peripheral side and the circumferential direction on the inner peripheral side of the sheave 4 respectively. For example, when the movable fins 8 accompanying the rotation of the sheave 4 come into contact with the guide 11, the rotation direction of the body portion 22 is greater than the fins in the radially outer row of the body portion 22 than the fins in the radially inner row. It is arranged so as to incline backward. In other words, when the sheave 4 rotates in the clockwise direction and the movable fin 8 contacts the guide 10, the angle of the movable fin 8 with respect to the radial direction is arranged on the outer peripheral side with respect to the movable fin 8 arranged on the inner peripheral side. By disposing the guide 11 so that the movable fin 8 is enlarged, as shown by the dotted line in FIG. 7, the movable fin 8 is formed so that the inclination angle gradually increases toward the outer side in the radial direction. Can do. In the example shown in FIG. 7, two rows of movable fins are arranged in a staggered manner in the radial direction, but three or more rows may be used.

  As described above, according to the present embodiment, the movable fins 8 are arranged in a plurality of rows in the radial direction, and the direction of the wind flow is changed stepwise so that the rotational speed of the hoisting machine Regardless of the size, the cooling effect of the hoisting machine can be increased by increasing the air volume corresponding to various hoisting machines.

  Note that various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiments. For example, some components may be deleted from all the components shown in the embodiment. Moreover, you may combine the component over different embodiment.

1 Housing, 2 shafts, 3 bearings, 4 sheaves, 4a rope groove, 5 stator, 6 permanent magnet, 7 cover, 8 movable fin, 9 fin rotating shaft, 10 partition plate, 11 guide, 12 adjustment hole, 20 hoisting Machine, 21 air passage forming part, 22 fuselage part, 23 rotor

Claims (8)

A frame fixed to the fixed side;
A sheave supported rotatably on a sheave rotating shaft provided in the frame, and wrapped around a rope;
The sheave is formed on the side surface of the sheave and radially arranged in an opening formed in a ring shape in the circumferential direction on the sheave rotary shaft side, and provided on the outer peripheral side or the inner peripheral side of the opening. A plurality of fins rotatably supported by the plurality of fin rotation shafts in the circumferential direction;
A partition plate fixed to the sheave and facing the closed surface of the opening with a gap;
A guide that is provided on the sheave or the partition plate and that abuts against the fin to suppress rotation of the fin;
An elevator hoisting machine characterized by comprising:   2. The elevator hoisting machine according to claim 1, wherein the fin has a shape in which a center of gravity is biased toward an outer peripheral side of the opening that is opposite to a side on which the fin rotation shaft is fixed. The fin rotation shaft is provided on the inner peripheral side of the opening,
The elevator hoisting machine according to claim 1 or 2, wherein the guide is disposed on an outer peripheral side of the opening portion with respect to the fin rotation shaft.   The elevator winding according to claim 3, wherein the fin has a linear cross-sectional shape and abuts against the guides respectively disposed on both sides of the fin in the circumferential direction to suppress rotation. Upper machine. The fin extends in a pair from the fin rotation axis to the outer peripheral side and has a streamline shape, and has a gap between the pair of fins,
The elevator hoisting machine according to claim 3, wherein the guide is disposed in the gap.   The elevator hoisting machine according to any one of claims 1 to 5, wherein a bell mouth-shaped curved surface portion is provided on an inner peripheral side of the disc-shaped partition plate.   A part of the fin is arranged in the gap between the closing surface of the sheave and the partition plate, and is arranged to extend from the outer peripheral side end of the opening to the outer peripheral side of the sheave. An elevator hoist according to any one of claims 3 to 6. A frame fixed to the fixed side;
A sheave supported rotatably on a sheave rotating shaft provided in the frame, and wrapped around a rope;
The sheaves are arranged radially in an opening formed in a ring shape in a circumferential direction on the side surface of the sheave and on the sheave rotary shaft side, and are arranged in a plurality of rows in the radial direction of the sheave and provided in the opening. A plurality of fins supported on the plurality of fin rotation shafts so as to be rotatable in the circumferential direction,
A partition plate fixed to the sheave and facing the closed surface of the opening with a gap;
A guide provided on the sheave or the partition plate and disposed on both sides of the fin to suppress rotation of the fin;
When the fins accompanying the rotation of the sheave come into contact with the guide, the fins in the radially outer row are rotated in the rotational direction of the sheaves more than the fins in the radially inner row. An elevator hoisting machine, wherein the elevator hoisting machine is disposed so as to be inclined backward with respect to the vehicle.

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