CN109384118B - Fault detection method for elevator brake control device - Google Patents
Fault detection method for elevator brake control device Download PDFInfo
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- CN109384118B CN109384118B CN201710668713.9A CN201710668713A CN109384118B CN 109384118 B CN109384118 B CN 109384118B CN 201710668713 A CN201710668713 A CN 201710668713A CN 109384118 B CN109384118 B CN 109384118B
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- brake
- elevator
- control device
- fault detection
- block
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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
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
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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
- B66B5/02—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
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
- B66B5/22—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by means of linearly-movable wedges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a fault detection method for an elevator brake control device, which comprises a brake assembly and a control unit, wherein the control unit controls a brake block in the brake assembly to brake and/or reset an elevator by an electronic signal according to elevator car information, and the fault detection method for the elevator brake control device is that the control unit makes fault detection judgment on the elevator brake control device according to the judgment on the position state of the brake block in the brake assembly. The fault detection method provided by the invention has the advantages that an additional detection structure is not required to be added, the production cost is reduced, the detection work of detection personnel is facilitated, and the detection work efficiency is improved.
Description
Technical Field
The invention relates to a detection method of an elevator, in particular to a fault detection method for an elevator brake control device.
Background
The braking device of an elevator is an important component of the whole elevator. At present, the elevator brake device is tested by using a special device on the whole elevator machine by detecting personnel, and in the test method, the operation of the detecting personnel is inconvenient and the elevator brake can not be objectively tested and evaluated due to the complex structure and large volume of the related detection equipment. Therefore, how to design a reasonable fault detection method reduces the production cost, facilitates the detection work of detection personnel, and improves the working efficiency is of extra importance.
Disclosure of Invention
The present invention has been made in view of the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a method for detecting an elevator, which can solve the problems of high efficiency and low cost of detection in an elevator brake control device, by using the original structure of an elevator brake device.
In order to achieve the above object, the present invention provides a fault detection method for an elevator brake control device, the elevator brake control device comprises a brake assembly and a control unit, the control unit controls a brake block in the brake assembly to brake and/or reset an elevator by an electronic signal according to elevator car information, and the fault detection method for the elevator brake control device is that a fault detection judgment is made on the elevator brake control device by the control unit according to the judgment of the position state of the brake block in the brake assembly.
Preferably, the failure detection judgment is performed in a state where the door of the elevator car is closed while the elevator stops operating.
Preferably, each set of brake assemblies comprises:
a support member for supporting the brake assembly;
the brake block comprises a braking surface, a guided surface, an elastic connecting surface and a free motion surface, wherein the braking surface is used for contacting or separating an elevator guide rail to brake or reset the elevator;
a guide block including a guide surface in frictional contact with a guided surface of the brake block to thereby contact or separate the guide block with or from the elevator guide rail, and a connection surface fixedly connected to the support member;
the elastic energy storage element is fixedly connected with the elastic connecting surface of the brake block, and the pushing force or the traction force generated by the elastic energy storage element on the brake block is used for controlling the position and the movement direction of the brake block;
at least one set of brake assemblies includes: and the electromagnetic actuator is used for receiving the electronic signal of the control unit and generating electromagnetic force to control the position and the movement direction of the brake block.
Preferably, the fault detection method comprises the steps of:
when a brake block in the elevator brake control device moves to a preset position, the elevator normally runs;
when the brake block does not reach the preset position, the elevator gives out a warning indication.
Preferably, the preset position is: the position of the brake pad corresponding to the minimum required output load of the electromagnetic actuating component.
Preferably, the corresponding position relation of the brake block when the electromagnetic actuating component requires the minimum output load is based on the distance S between the free moving surface of the brake block and the support frame and the electromagnetic force F of the electromagnetic actuatoraThe relationship between them is calculated.
Preferably, the calculation method is as follows:
the compression amount of the elastic energy storage element is x, and x is f (S);
the thrust generated by the single elastic energy storage element is Fk, the rigidity of the elastic energy storage element is k, and then Fk＝kx；
The electromagnetic force of the electromagnetic actuator is FaThe gravity of the brake block is mg, the pressure between the brake block and the guide block is N, the number of the elastic energy storage elements is N, theta is the included angle between the motion direction of the brake block and the vertical direction, and F isa＝(nFk-mg)cosθ。
Preferably, the fault detection judgment is carried out at the time of a time period with low elevator calling frequency.
The fault detection method for the elevator brake control device can detect whether the force output of all actuators in the elevator brake control device is normal or not, and can achieve the purpose of detection only by utilizing the structure of the original brake device without adding an additional structure, so that the production cost is reduced, detection personnel can conveniently perform detection work, and the working efficiency is greatly improved.
Drawings
Fig. 1 is a schematic view of an elevator brake control apparatus in a non-braking state in a fault detection method for an elevator brake control apparatus according to the present invention.
Fig. 2 is a schematic view of an elevator brake control device in a braking state according to a fault detection method for the elevator brake control device of the present invention.
Fig. 3 is a schematic diagram of a fault detection method for an elevator brake control apparatus of the present invention.
Fig. 4 is a schematic view illustrating a stress condition of a brake pad in the fault detection method for the elevator brake control device according to the present invention.
Description of reference numerals:
2 elevator guide rail 3 elevator brake control device
30 brake assembly 31 brake pad
32 support frame 32a frame upper plate
33 elastic element
35 guide block 36 elastomer
8 electromagnetic actuator
8a electromagnetic actuator movable part 8b electromagnetic actuator fixed part
Detailed Description
As shown in fig. 1-2, the elevator brake control device 3 used in the fault detection method of the elevator brake control device of the present invention includes a brake assembly 30, and the brake assembly 30 includes a brake shoe 31, a support frame 32, a guide shoe 35, the brake shoe 31, an elastic member 33, and an electromagnetic actuator 8.
Wherein, the brake block 31 is arranged at one side of the elevator guide rail 2, and an included angle is formed between the braking surface (i.e. the front surface close to the guide rail 2) and the guiding surface (i.e. the back surface far away from the guide rail 2) of the brake block 31, so that the brake block 31 is wedge-shaped (i.e. the guiding surface of the brake block 31 is an inclined surface); the braking surface of the brake shoe 31 is parallel to the side surface of the guide rail 2, and an included angle is formed between the guiding surface of the brake shoe 31 and the side surface of the guide rail 2.
The brake pad further comprises an elastic connection surface fixedly connected to the elastic element 33 and a free moving surface on the other side of the brake pad with respect to the elastic connection surface, which free moving surface is freely movable with respect to the support frame 32.
The guide block 35 is fixedly connected with the support frame 32 through an elastic body 36; the support frame 32 is fixedly connected with the car; the brake block 31 is connected to the support frame 32 by means of an elastic member; the actuator 8 is used for keeping the position of the brake block 31 and limiting the movement direction of the brake block; the elastic body 36 can cause the brake shoe 31 to generate a pressing force against the rail 2.
The electromagnetic actuator 8 is composed of a movable portion 8a and a fixed portion 8b, 8a being fixedly attached to the guide surface of the brake pad 31 (i.e., the back surface away from the guide rail 2), and 8b being fixedly attached to the side surface of the guide block 35 close to the brake pad 31.
The contact surface of the guide block 35 with the actuator fixing portion 8b is a slope whose angle of inclination matches the guide surface of the brake pad 31 to ensure that the braking surface of the brake pad 31 is parallel to the side surface of the guide rail 2.
The elastic element 33 has one end fixed to the support frame 32 and the other end fixed to the elastic connection surface of the brake pad 31, and the pushing force or the pulling force generated by the elastic element 33 on the brake pad 31 is used to control the position and the moving direction of the brake pad 31.
The failure detection device of the elevator brake control device further comprises a control unit which controls the brake assembly 30 with an electronic signal according to elevator car information; the failure detection device of the elevator brake control device controls the brake assembly 30 through the control unit, and enables the brake assembly 30 to brake, reset and adjust the elevator by means of electromagnetic actuating force.
The working principle of the elevator brake control device in the fault detection method for the elevator brake control device is as follows:
fig. 1 is a schematic view of the elevator brake control apparatus in an unbraked state in which there is a gap between the braking surface of the brake shoe 31 and the guide rail 2, and the position of the brake shoe 31 is maintained by feedback control of the control unit.
When the brake block 31 needs to move in a direction close to the upper plate 32a of the frame, the actuator 8 generates an electromagnetic force that pushes the brake block 31 to move, and together with the elastic force of the elastic member 33, pushes the brake block 31 to move upward along the guide rail 2 relative to the support frame 32 (the brake block 31 still keeps moving downward relative to the guide rail 2), so that the gap between the brake block 31 and the guide rail 2 is gradually reduced until the brake block 31 contacts the guide rail 2 and generates a sliding friction force. As the brake shoe 31 moves downward relative to the rail 2, the sliding friction force between the brake shoe 31 and the rail 2, which moves the brake shoe 31 in a direction closer to the frame upper plate 32a until the brake shoe 31 contacts the frame upper plate 32a, is directed upward; figure 3 shows the brake shoe in contact with the upper plate 32 a. In this process, the sliding friction force gradually increases, and the braking force is transmitted to the car 1 through the frame upper plate 32a of the support frame 32, thereby implementing deceleration braking on the car 1.
After braking is finished, before the elevator car 1 returns to normal operation, the fault detection device of the elevator brake control device needs to be returned from the braking state (shown in fig. 2) to the normal operation state (shown in fig. 1), in the process, the car 1 slightly moves upwards, and the brake block 31 overcomes the elastic force of the elastic element 33 and moves towards the direction far away from the frame end upper plate 32a under the action of the electromagnetic actuator until the brake block 31 reaches the expected position.
Fig. 3 is a block diagram of a fault detection method for an elevator brake control device. By this method it is possible to detect whether the force output of each actuator of the brake control device is normal. The specific steps of fault detection are as follows:
in step 200, a certain time has elapsed since the last detection and the elevator is in a door-closed standby state. The detection procedure is described as being performed at certain time intervals, which are based on the system clock or timer of the elevator.
Preferably, the fault detection routine is performed every 24 hours and during a time period when elevator call frequency is low.
The elevator is in a door closing standby state, which shows that no person or object exists in the car and the car door is closed.
If not 200, the fault detection program is exited and the elevator continues to operate normally.
If 200 is satisfied, step 201 is performed. In step 201, the elevator stops responding to an external call, thereby preventing a person or thing from entering the car during the fault detection, and the car stops running, which explains that the subsequent detection process is performed in a state where the elevator car is stopped.
In step 202, all the actuators in the brake control device are de-energized, and the brake block 31 moves upwards under the pushing of the spring 33, and during the upward movement, the brake block approaches the guide rail and finally contacts the guide rail to generate friction force, so that the brake block stops at a certain position.
In step 203, the first set of actuators is actuated to generate a downward force to push the brake pad downward. During which the brake shoes are out of contact with the guide rails.
In step 204, whether the brake block moves to a preset position is judged, and if the condition is met, the actuator is judged to work normally. The target position of the downward movement of the brake pad is determined according to the following method:
assuming that the free running surface of the brake pad is at a distance S from the support frame, see fig. 1, the corresponding spring 33 has a compression x, i.e.
x＝f(S)
The thrust generated by the single spring 33 is Fk, and the spring rate of the spring 33 iskThen, then
Fk＝kx
The electromagnetic force generated by the actuator is FaWhen the gravity of the brake block is mg, the positive pressure between the brake block and the caliper block is N, N is the number of springs 33 in the brake control device, and the stress condition of the brake block is shown in FIG. 4, the brake control device can be used for braking a brake shoe
Fa＝(nFk-mg)cosθ
Wherein theta is an included angle between the movement direction of the wedge block and the vertical direction.
Thereby establishing the distance S between the brake block and the upper plate and the electromagnetic force F of the actuatoraThe relationship between them. From this relationship, the wedge position corresponding to the minimum required output load of the actuator, i.e. the preset position to be reached by the wedge in step 204, can be calculated.
If the wedge does not reach the preset position in step 204, it is determined that the actuator is malfunctioning, and step 205 is performed, where the elevator cannot be restarted and a warning is issued.
If the wedge reaches the predetermined position in step 204, it is determined that the set of actuators is operating properly, and step 206 is performed.
In step 206, whether all the actuators are tested is checked, if all the actuators are tested, step 208 is executed, the elevator returns to the normal running state, and the brake control device completes the detection.
If in step 206 it is established that there are more actuators that have not been tested, step 207 is executed, and in step 207 all actuators are de-energized and the brake pad is moved upwards to a certain position under the urging of the spring force.
The next set of actuators pushes the wedge downward in step 208, which is similar to step 203. The determination of all the actuators is accomplished by the loop operation of steps 204, 206, 207 and 208.
Claims (5)
1. A fault detection method for an elevator brake control device, the elevator brake control device comprises a brake assembly and a control unit, the control unit controls a brake block in the brake assembly to brake and/or reset an elevator by an electronic signal according to elevator car information, the fault detection method for the elevator brake control device is characterized in that a fault detection judgment is made on the elevator brake control device by the control unit according to the position state of the brake block in the brake assembly, the fault detection judgment is made under the condition that the elevator car door is closed and the elevator stops running, each group of brake assemblies comprises:
a support member for supporting the brake assembly;
the brake block comprises a braking surface, a guided surface, an elastic connecting surface and a free motion surface, wherein the braking surface is used for contacting or separating an elevator guide rail to brake or reset the elevator;
a guide block including a guide surface in frictional contact with a guided surface of the brake block to thereby contact or separate the brake block with or from the elevator guide rail, and a connection surface fixedly connected to the support member;
the elastic energy storage element is fixedly connected with the elastic connecting surface of the brake block, and the pushing force or the traction force generated by the elastic energy storage element on the brake block is used for controlling the position and the movement direction of the brake block;
at least one set of brake assemblies includes: the electromagnetic actuator is used for receiving the electronic signal of the control unit and generating electromagnetic action force to control the position and the movement direction of the brake block;
the fault detection method comprises the following steps:
after the elevator car stops running, all the actuators lose power, and the brake wedge block moves upwards to a certain position under the pushing of the spring, and the first group of actuators push the brake wedge block to move downwards;
when a brake block in the elevator brake control device moves to a preset position, the elevator normally runs;
when the brake block does not reach the preset position, the elevator gives out a warning indication.
2. The fault detection method for an elevator brake control device according to claim 1, wherein the preset positions are: and the position of the corresponding brake block at the minimum required output load of the electromagnetic actuator.
3. The fault detection method for an elevator brake control device according to claim 2, wherein the position relationship of the brake shoe corresponding to the minimum required output load of the electromagnetic actuating member is based on a distance S between a free moving surface of the brake shoe and the support frame and an electromagnetic force F of the electromagnetic actuatoraThe relationship between them is calculated.
4. The fault detection method for an elevator brake control device according to claim 3, wherein the calculation method of the corresponding brake pad position relationship at the time of the minimum required output load of the electromagnetic actuating member is:
the compression amount of the elastic energy storage element is x, and x = f (S);
thrust generated by a single elastic energy storage element is FkThe stiffness of the elastic energy storage element is k, then Fk=kx；
The electromagnetic force of the electromagnetic actuator is FaThe gravity of the brake block is mg, the pressure between the brake block and the guide block is N, the number of the elastic energy storage elements is N, theta is the included angle between the motion direction of the brake block and the vertical direction, and F isa=(nFk-mg)cosθ。
5. The fault detection method for an elevator brake control device according to claim 4, wherein the fault detection judgment is made at a timing of a period in which an elevator call frequency is low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710668713.9A CN109384118B (en) | 2017-08-08 | 2017-08-08 | Fault detection method for elevator brake control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710668713.9A CN109384118B (en) | 2017-08-08 | 2017-08-08 | Fault detection method for elevator brake control device |
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| CN109384118A CN109384118A (en) | 2019-02-26 |
| CN109384118B true CN109384118B (en) | 2021-03-16 |
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| CN201710668713.9A Active CN109384118B (en) | 2017-08-08 | 2017-08-08 | Fault detection method for elevator brake control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE202019101479U1 (en) | 2019-03-15 | 2020-06-18 | Inventio Ag | Safety brake device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0627842U (en) * | 1992-09-22 | 1994-04-12 | 株式会社日立ビルシステムサービス | Elevator electromagnetic brake operating state detection device |
| JP2000095460A (en) * | 1998-09-22 | 2000-04-04 | Toshiba Elevator Co Ltd | Disc brake for elevator |
| JP4273677B2 (en) * | 2001-04-20 | 2009-06-03 | 株式会社日立製作所 | Elevator equipment |
| JP4137754B2 (en) * | 2003-09-29 | 2008-08-20 | 株式会社日立製作所 | Elevator governor |
| JP4667489B2 (en) * | 2008-07-08 | 2011-04-13 | 東芝エレベータ株式会社 | Brake inspection system for elevators |
| CN103562109A (en) * | 2011-05-30 | 2014-02-05 | 因温特奥股份公司 | Controllable elevator brake |
| JP6215027B2 (en) * | 2013-12-03 | 2017-10-18 | 株式会社日立製作所 | Brake control device for elevator maintenance inspection |
| DE102016200593A1 (en) * | 2016-01-19 | 2017-07-20 | Thyssenkrupp Ag | Braking device for a car of an elevator system |
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