CN114074878A

CN114074878A - Lubricating grease solidification reducing device

Info

Publication number: CN114074878A
Application number: CN202110856343.8A
Authority: CN
Inventors: 伊藤勇辉
Original assignee: Toshiba Elevator Co Ltd
Current assignee: Toshiba Elevator and Building Systems Corp
Priority date: 2020-08-11
Filing date: 2021-07-28
Publication date: 2022-02-22
Anticipated expiration: 2041-07-28
Also published as: CN114074878B; JP7032494B2; JP2022032251A

Abstract

The present invention relates to a grease solidification reducing device capable of reducing solidification of grease in a rope or a sheave. The grease solidification reducing device is provided with a rope wheel heating unit for heating a rope wheel for winding a rope, and reduces solidification of grease attached to the rope by heating the rope wheel in an elevator building. The sheave heating unit includes a heat source device disposed in the elevator building to generate heat, and a heat guide member for guiding heat of the heat source device to the sheave, and the heat guide member includes a radiator disposed in the hoist, a blower for blowing air to the radiator, and a duct for guiding the delivered air to the sheave.

Description

Lubricating grease solidification reducing device

This application is based on Japanese patent application No. 2020-. This application incorporates by reference the entirety of this application.

Technical Field

Embodiments of the present invention relate to a grease solidification reducing device that reduces solidification of grease adhering to a rope in an elevator building.

Background

In an elevator building, a structure in which hoisted or lowered objects such as a car and a counterweight (C/W) are connected by a rope wound around a sheave is known.

For example, in a governor device, a governor rope interlocked with a car is wound around a governor sheave, and when the speed of descent of the car exceeds a rated speed, a safety device operates to bring the car to an emergency stop.

In this governor sheave, grease is impregnated into or applied to the rope in order to smooth the driving of the rope, but the grease that has oozed out or the grease that has been applied may become solid when the temperature drops.

Disclosure of Invention

However, if grease is fixed to the rope or the sheave, there is a problem that the grease may cause an erroneous operation such as cutting of a governor switch provided on the governor sheave.

An object of the present embodiment is to provide a grease solidification reducing device capable of reducing solidification of grease in a rope or a sheave.

The present embodiment is a grease solidification reduction device including a sheave heating means for heating a sheave around which a rope is wound, wherein solidification of grease adhering to the rope is reduced by heating the sheave in an elevator building.

Drawings

Fig. 1 is a side view showing a schematic configuration in an elevator building.

Fig. 2 is a perspective view showing the hoist and its surroundings.

Fig. 3 is a perspective view showing the governor sheave and its surroundings.

Detailed Description

[ first embodiment ]

The grease solidification reducing device according to the first embodiment will be described below with reference to the attached drawings.

As shown in fig. 1, a hoistway 1 is provided in an elevator building, a car 3, a counterweight 5, and a hoisting machine 7 are provided in the hoistway 1, and the car 3 and the counterweight 5 are connected by a main rope 9 looped around a main sheave 7a of the hoisting machine 7.

A safety device 11 is provided in the hoistway 1, and when the car 3 descends at a speed exceeding a predetermined rated speed, the safety device 11 stops the car 3 in an emergency.

The safety device 11 includes a speed governor device 13, an emergency braking device 15, and an operating mechanism 17 of the emergency braking device 15.

The governor device 13 includes a governor rope (rope) 19 linked to the raising and lowering of the car 3, a governor sheave (sheave) 21, and a limit switch 23, and the governor rope 19 is an annular rope and is wound around the tensioner sheave 25 and the governor sheave 21.

Grease is caused to penetrate into the governor rope 19, and the grease is caused to seep out, thereby achieving smooth driving of the governor rope 19 and the governor sheave 21.

When the rotational speed of the governor sheave 21 reaches an overspeed state, a flyweight (not shown) is operated outward by centrifugal force and is brought into contact with and engaged with an operating piece of the limit switch 23.

A grease solidification reducing device 31 is provided between the hoist 3 and the governor device 13.

A control cabinet (heat source device) 25 is provided near the hoisting machine 3, and the control cabinet 25 controls various devices in the hoistway such as the hoisting machine 7.

As shown in fig. 2, the hoisting machine 7 includes a main sheave 7a for winding the main rope 9 and a motor 7b for driving the main sheave 7a, and the motor 7b is covered with a cover. The motor 7b is a heat source device that generates heat by being driven.

In fig. 2, the main ropes 9 are not shown.

As shown in fig. 2 and 3, the grease solidification reduction device 31 includes a sheave heating unit 33 that heats the governor sheave 21, and the grease is reduced from being fixed to the governor rope 19 and the governor sheave 21 by heating the governor sheave 21 by the sheave heating unit 33.

The sheave heating unit 33 includes a radiator 35 provided to the motor 7b of the hoist 7,

blowers

37a and 37b, and a duct 39.

The heat sink 35 is configured by arranging a plurality of fins 35a that transfer heat of the motor 7b, and extracts heat of the fins 35a by blowing air between the fins 35a, and transfers heat to air passing between the

fins

35a, 35 a.

Two

blowers

37a and 37b are provided in total, and are respectively provided above the motor 7b, and the radiator 35 is disposed between the two

blowers

37a and 37 b. The

blowers

37a and 37b blow air in the same direction a as indicated by an arrow a in fig. 2.

The one fan 37a blows air that has acquired the atmosphere around the motor 7b toward the radiator 35.

As shown in fig. 1, the duct 39 is provided from the hoist 7 to the governor sheave 21, and has one end serving as an intake port 39a (see fig. 2) for taking in air and the other end serving as an outlet port 39b (see fig. 3) for blowing out warm air.

As shown in fig. 2, the intake port 39a is opened at a position slightly distant from the other blower 37 on the downstream side of the wind fed by the other blower 37 b.

As shown in fig. 3, the outlet 39b opens at a position facing the front surface of the governor sheave 21.

As shown in fig. 1, the front surface of the governor sheave 21 is a surface perpendicular to the rotation shaft 21a and on the opposite side of the support member 21b that cantilevers and supports the rotation shaft 21 a.

The discharge port 39b is located above the rotation shaft 21a on the front surface of the governor sheave 21.

Next, the operation of the grease solidification reducing apparatus 31 of the embodiment will be described.

As shown in fig. 1, when the elevator is operated, the motor 7b (heat source device) generates heat by driving the hoisting machine 7 in the hoistway 1, and various devices (heat source devices) such as an air conditioner installed in the control cabinet 25 and the car 3 operate, and the heat is accumulated above the hoistway 1.

On the other hand, the motor 7b of the hoist 7 also discharges the largest amount of heat in the equipment in the elevator building. The heat of the motor 7b is transferred to the radiator 35.

As shown in fig. 2, when the

blowers

37a and 37b are driven, the

blowers

37a and 37b capture the atmosphere around the hoist 7 and blow the atmosphere to the radiator 35, and the wind warmed by the radiator 35 is captured to the capture port 39a of the duct 39.

As shown in fig. 3, the heated air guided by the duct 39 is blown out from the air outlet 39b of the duct 39 toward the front surface (see fig. 1) of the speed governor sheave 21 above the rotary shaft 21a of the speed governor sheave 21, thereby heating the speed governor sheave 21.

Next, the effect of the grease solidification reducing apparatus 31 will be described.

According to the embodiment, since the governor sheave (sheave) 21 is warmed by the sheave warming-up unit 33, it is possible to reduce the amount of grease adhering to the governor rope 19 that cools and solidifies.

The sheave heating means 33 heats the governor sheave by using heat discharged from the motor 7b of the hoist 7 as a heat source device in the elevator building, and therefore, has excellent energy efficiency.

Since the motor 7b of the hoist 7 can be cooled by using the heat of the motor 7b, the output of the motor 7b can be increased, and the motor 7b can be made small.

The sheave heating means 33 further heats the atmosphere (atmosphere having a high temperature) stored above the hoistway 1 by the heat discharged from the motor 7b, and thus energy efficiency is also good at this point.

Since the heat of the motor 7b (heat source device) of the hoist 7 is guided to the speed governor sheave (sheave) 21 by the duct 39 serving as a heat guide member, the heat can be intensively supplied to the speed governor sheave without being diffused, and thus the energy efficiency is also good at this point.

By heating the governor sheave 21, solidification of grease adhering to the governor rope 19 is reduced, and therefore malfunction of the limit switch 23 due to solidified grease can be prevented, and performance of the safety device 11 can be improved.

Since the outlet 39b of the duct 39 blows warm air toward the front of the governor sheave 21, the warm air does not directly blow on the governor rope 19, and thus drying of grease due to scattering of grease oozing from the governor rope 19 or the like can be prevented.

Since the outlet 39b of the duct 39 blows warm air to the upper side of the rotation shaft 21a in the governor sheave 21, the governor rope wound around the upper half portion of the governor sheave 21 can be heated efficiently.

The above embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various ways, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. The embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

For example, the sheave heating unit 33 is not limited to blowing warm air through the duct 39, and may heat the governor sheave 21 by directly providing a heat generating component such as a heater or a peltier element to the governor sheave 21 or to a position close to the governor sheave 21.

The sheave heating unit 33 may be the motor 7b of the hoist 7, and the governor sheave 21 may be disposed at a position where heat generated by the motor 7b is received to heat the governor sheave 21.

In the above-described embodiment, the motor 7b of the hoist 7 is described as an example of the heat source device, but another motor, the control cabinet 25, and the like located in the elevator building may be used as the heat source device. For example, the heat of the control cabinet 25 may be sent to the governor sheave 21 by the blower 37 and the duct 39.

In the above-described embodiment, the speed governor sheave 21 is described as an example of a sheave around which a rope is wound, but the present invention is not limited to this, and the main sheave 7a of the hoist 7 and another sheave around which a rope is wound in an elevator building may be used.

Claims

1. A grease solidification reduction device is characterized by comprising a rope sheave heating unit for heating a rope sheave around which a rope is wound, and reducing solidification of grease adhering to the rope by heating the rope sheave in an elevator building.

2. The grease solidification reduction apparatus of claim 1,

the sheave heating unit includes a heat source device that is provided in the elevator building and generates heat, and a heat guide member that guides heat of the heat source device to the sheave.

3. The grease solidification reduction apparatus of claim 2,

the heat source device is a hoist that raises and lowers a car, and the sheave is a governor sheave.

4. The grease solidification reduction apparatus of claim 3,

the heat guide member includes a radiator provided in the hoist, a blower for blowing air to the radiator, and a duct for guiding the blown air to the sheave.

5. The grease solidification reduction apparatus of claim 4,

the outlet of the duct is directed only toward the sheave and not toward the rope.

6. The grease solidification reduction apparatus of claim 4,

the outlet of the duct is directed toward a surface of the sheave perpendicular to the rotation axis and upward of the rotation axis.