KR20170011241A - Braking force test method of elevator double brake - Google Patents

Braking force test method of elevator double brake Download PDF

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Publication number
KR20170011241A
KR20170011241A KR1020150103520A KR20150103520A KR20170011241A KR 20170011241 A KR20170011241 A KR 20170011241A KR 1020150103520 A KR1020150103520 A KR 1020150103520A KR 20150103520 A KR20150103520 A KR 20150103520A KR 20170011241 A KR20170011241 A KR 20170011241A
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KR
South Korea
Prior art keywords
brake
elevator
braking force
torque
double
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KR1020150103520A
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Korean (ko)
Inventor
진호연
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현대엘리베이터주식회사
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Priority to KR1020150103520A priority Critical patent/KR20170011241A/en
Publication of KR20170011241A publication Critical patent/KR20170011241A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
    • B66B5/0093—Testing of safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0037—Performance analysers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Elevator Control (AREA)

Abstract

The present invention relates to a braking force verification method for a double brake of an elevator. While a single braking device in an elevator traction machine applied with the double brake restricts a traction sheave unit, a mount sensor senses a slip of the sheave unit after a driver generates a torque, thereby verifying the braking force of the brake. According to the present invention, the braking force verification method for a double brake of an elevator includes: a step in which an elevator car moved to a middle floor for executing a braking force test of the brake maintains the closed state of a door in a state of having the mount sensor installed on the upper part of the elevator car while the double brake is applied to the traction sheave unit of the elevator; a step in which an unbalance rate is measured after opening a pair of brake units configuring the double brake on the traction sheave unit; a step in which one of the brake units in the double brake arranged on the traction sheave unit is opened; a step in which an upward torque is generated while the single brake is opened; a step in which a detection operation is executed to determine the movement of an encoder or the mount sensor when the upward torque is generated; and a step in which an elevator operation is stopped after determining an abnormal braking force state of the brake when the movement of the encoder or mount sensor is detected after generation of the upward torque.

Description

[0001] DESCRIPTION [0002] BRAKING FORCE TEST METHOD OF ELEVATOR DOUBLE BRAKE [0003]

More particularly, the present invention relates to a method for verifying braking force of an elevator double brake, and more particularly, to a method of verifying braking force of an elevator double braking device in which, in an elevator hoisting machine to which a double brake is applied, a braking device generates torque with a driving device while restraining a hoisting sheave, The present invention relates to a method for verifying braking force of an elevator double brake, which is capable of verifying the braking force of the brake.

      BACKGROUND ART Generally, a hoisting machine is installed in a machine room in an elevator device installed for vertical movement such as a person or an object in various types of buildings built for residential use or business, and then the rope wound on the hoisting machine sheave under the control of the elevator control portion is selectively As shown in FIG.

      Thus, the elevator car connected to the one end and the other end of the rope wound on the sheave of the hoisting machine and the balance can be selectively moved up or down while moving the passenger on the elevator car to the corresponding floor according to the operation of the call input button .

      On the other hand, the traction machine is provided with a braking device of a double structure, so that a predetermined braking force is generated so that the traction machine is controlled.

      That is, the braking device (brake) of the elevator needs the ability to braking the inertia of the entire system of the motor and the elevator, and operates when the main power supply is cut off or the power supply is cut off from the control circuit, You have to keep the state.

      When the braking force of the brakes provided in the elevator apparatus and the slippage when the elevator door is opened are likely to occur, there is a possibility that the elevator car crashes or the passengers are caught in the door. In order to prevent such accidents The braking force of the brake must be verified periodically and accurately.

      To this end, in Korean Patent Registration No. 10-0976612, "a braking force verification of an elevator consisting of an elevator car, a balance weight connected to the elevator car by a rope, and a traction machine including an electric motor and a brake for moving the elevator car and the balance weight up and down The rotary shaft connecting portion includes a rotating shaft connecting portion, one end of which is fixed to one side of a rotating shaft of the electric motor, and a second through hole is formed at a predetermined position by being fastened to the other end of the rotating shaft connecting portion. A grip portion that is inserted through the first through hole of the frame portion and is formed to be perpendicular to the rotation shaft of the electric motor and rotates the rotation shaft of the electric motor; The torque sensor detects the torque caused by the rotation of the shaft Wherein the torque sensor senses a torque of a rotating shaft of the electric motor in a state where the brake of the elevator is in an unlocked state and the handle is in a state in which the brake of the elevator is operated, The braking force verification device of an elevator for detecting whether or not the slip of the brake of the elevator is detected by forcibly rotating the rotating shaft of the electric motor in the direction of load of the balance weight by a torque value sensed by the torque sensor in the state In Japanese Patent Laid-Open Publication No. 2000-0013728 discloses "a speed detector for detecting the rotation speed of a motor, a microcomputer for controlling the entire apparatus on the basis of the traveling speed and the layered detection signal of an elevator car, Which receives the torque command from the motor Wherein the microcomputer controls the braking force of the brake by the rotation speed of the motor when the torque command and the brake braking command are output together, A door closing command and a brake command for the electronic brake at the time of stopping the elevator car and generating a torque command for the power converter at the time of operation of the elevator car and at the time of detecting the braking force A brake failure detection device for an elevator configured by an operation control means for an elevator.

      However, in the former case, in order to verify the braking force of the braking device, there is a problem that special measuring equipment is required, and at the time when the elevator is actually installed and operated, the braking force is very difficult to verify.

      Further, in the latter case, a problem that a greater force than the braking force of the double brakes is required to detect the braking force of the brakes when the double brakes are applied, and a problem that the braking force of either one of the brakes can not be detected .

Korean Patent No. 10-0976612 Korean Patent Publication No. 2000-0013728

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a dual-braked elevator hoisting machine in which a single braking device generates torque with a driving device while restraining a hoisting sheave, And to provide a method for verifying the braking force of an elevator double brake that can verify the braking force of the brake as the sensor senses the slip of the sheave.

 According to another aspect of the present invention, there is provided a method for verifying braking force of an elevator double braking system, comprising the steps of: applying a double braking force to a hoisting sheave of an elevator; Maintaining a closed state of the door when the elevator car moved to the intermediate layer to proceed the braking force test of the brake; Opening a pair of brakes constituting a double brake on the hoisting machine sheave and measuring an unbalance rate; Opening one of the double brakes provided in the hoisting machine sheave; Generating a torque in an up direction in the one brake open state; Determining whether the motion of the encoder and the conception sensor is detected when the torque in the upward direction is generated; And detecting the braking force abnormality of the brakes when the motions of the encoder and the conception sensor are detected when the torque in the up direction is detected, thereby stopping the elevator operation.

Preferably, in the step of stopping the elevator operation, the braking force abnormality state of the brake is determined based on the sum of the pure unbalance torque (No load state) T u , the driver and the inverter output torque T inv , (T total ) of the braking force is compared with the braking braking torque (T B ). If T B <T total , the braking force is determined to be abnormal.

      According to the present invention as described above, in the elevator hoisting machine to which the double brakes are applied, one braking device generates torque by the driving device while restraining the hoisting sheave, and then the hoisting sensor used for the normal operation of the elevator, It is possible to solve the problem that an EVA or a torque sensor, which is a separate measuring instrument, is necessarily required to verify the braking force of the braking device.

      When the dual brake of the elevator is applied, the unbalance ratio of the counterweight and the drive inverter torque are used together, so that the inverter torque of the driver can be reduced.

      Further, as the double brakes of the elevator can test the braking forces for the respective brakes, it is possible to easily detect the loss of the braking forces for the respective brakes.

1 is a schematic system configuration diagram to which a braking force verification method for an elevator double brake according to the present invention is applied;
2 is a flowchart showing a braking force verification method for an elevator double brake according to the present invention.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic system configuration diagram to which a braking force verification method for an elevator double brake according to the present invention is applied. FIG. 2 is a flowchart showing a braking force verification method for an elevator double brake according to the present invention.

A method of verifying braking force of an elevator double brake according to the present invention is characterized in that, in an elevator hoisting machine to which a double brake is applied, after one braking device generates torque by a driving device while restraining a hoisting sheave, The braking force of the brake can be verified.

First, an elevator system to which a braking force verification method for an elevator double brake according to the present invention is applied is characterized in that a double brake 12 composed of a pair of brakes is applied to a hoisting machine sheave 10 of an elevator as shown in FIG. 1 And an elevator car 30 and a counterweight 40 are installed on both ends of the main rope 20 wound on the sheave 10.

Further, an elevation sensor 32 for detecting the elevation position of the elevator during operation of the elevator is provided on the elevator car 30.

Next, a braking force verification method for an elevator double brake according to the present invention will be described in detail with reference to FIGS. 1 and 2. FIG.

First, in an elevator system in which a double brake 12 is applied to a hoisting machine sheave 10 of an elevator and a conception sensor 32 is provided on an elevator car 30, the elevator car 30 is provided with a pair of brakes The door is kept in the closed state in the state of being moved to the intermediate layer for the braking force test progress of the door 12 (step 100).

Here, in the braking force verification method of the elevator double brake 12, the braking force test of the brake is based on the following formula.

Figure pat00001

The unbalanced torque is T u = (1 - B) × Q, the output torque of the driver and inverter is T inv , and the brake braking torque is T B = F × r , The test total torque is T total = T inv + T u .

A pair of brakes constituting the double brake 12 applied to the hoisting machine sheave 10 are measured in the open state (step 200), and then the double brakes (not shown) provided in the hoisting machine sheave 10 12 is opened (step 300).

      After the step of generating the torque in the upward direction in the one brake release state proceeds (step 400), it is determined whether the motion of the encoder and the conception sensor 32 is detected when the torque in the up direction is generated (Step 500).

      As a result of the determination in step 500, when the motion of the encoder and the conception sensor 32 is detected when the torque in the up direction is detected, the step of stopping the elevator operation is determined by determining the braking force abnormality state of the brake 600).

      In other words, during the braking force test as described above, when the signal of the landing sensor 32 provided on the elevator car 30 is detected to move upward, it is determined that an abnormality has occurred in the braking force of the brake .

      That is, in the braking force verification of the elevator double brake,

- by design T B > T total TEST ------ OK

- By design T B <T total TEST ------ NO Good.

At this time, T total = T inv + T u , and T inv , T u , and T B represent the inverter toque, unbalance toque, and brake toque, respectively.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.

10: Sheve, 12: Double brake,
20: main rope, 30: elevator car,
32: Implantation sensor, 40: Counterweight.

Claims (2)

A double brake is applied to the hoisting sheave of the elevator and an elevation sensor is installed on the elevator car;
Maintaining a closed state of the door when the elevator car moved to the intermediate layer to proceed with the braking force test of the brake;
Opening a pair of brakes constituting a double brake on the hoisting machine sheave and measuring an unbalance rate;
Opening one of the double brakes provided in the hoisting machine sheave;
Generating a torque in an up direction in the one brake open state;
Determining whether the motion of the encoder and the conception sensor is detected when the torque in the upward direction is generated;
Wherein the braking force of the elevator double brakes is determined by determining that the braking force of the braking force is abnormal and stopping the operation of the elevator when the motion of the encoder and the conception sensor is detected when the torque is generated in the upward direction Verification method. The method according to claim 1,
In the step of stopping the elevator operation, in determining the abnormal state of the braking force of the brake,
The test total additional torque T total is obtained from the sum of the pure unbalance torque (No load state) T u and the drive unit and the inverter output torque T inv and then compared with the brake braking torque T B ,
And when it is determined that T B < T total , it is determined that the brake braking force is in an abnormal state.
KR1020150103520A 2015-07-22 2015-07-22 Braking force test method of elevator double brake KR20170011241A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108181519A (en) * 2017-11-23 2018-06-19 廊坊凯博建设机械科技有限公司 A kind of method of dynamic test elevator traction machine contracting brake

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000013728A (en) 1998-08-12 2000-03-06 이종수 Device for detecting abnormality of brake of elevator
KR100976612B1 (en) 2009-06-16 2010-08-17 (재)한국승강기안전기술원 A device of checking a brake performance for elevator and a method of using the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000013728A (en) 1998-08-12 2000-03-06 이종수 Device for detecting abnormality of brake of elevator
KR100976612B1 (en) 2009-06-16 2010-08-17 (재)한국승강기안전기술원 A device of checking a brake performance for elevator and a method of using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108181519A (en) * 2017-11-23 2018-06-19 廊坊凯博建设机械科技有限公司 A kind of method of dynamic test elevator traction machine contracting brake

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