CN114229644A - Elevator maintenance evaluation method - Google Patents
Elevator maintenance evaluation method Download PDFInfo
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- CN114229644A CN114229644A CN202111569687.7A CN202111569687A CN114229644A CN 114229644 A CN114229644 A CN 114229644A CN 202111569687 A CN202111569687 A CN 202111569687A CN 114229644 A CN114229644 A CN 114229644A
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- 238000011156 evaluation Methods 0.000 title claims abstract description 20
- 238000012423 maintenance Methods 0.000 title claims abstract description 19
- 230000000694 effects Effects 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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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
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- Indicating And Signalling Devices For Elevators (AREA)
Abstract
The invention relates to an elevator maintenance evaluation method.A traction sheave of a traction machine is connected with an encoder, and the encoder is connected with an upper computer; the elevator overhaul evaluation method comprises the following steps: step one, inputting elevator maintenance parameter values on an upper computer; stopping the elevator car to the same horizontal position with the elevator counterweight; when the elevator car is still, the upper computer calculates the torque of the traction machine brake on the traction sheave to be T1(ii) a Step two, under the condition that a tractor brake tightly holds the traction sheave, the torque output by the tractor is gradually changed from small to large; when the output pulse signal of the detection encoder exceeds a preset value, the torque output by the traction machine at the moment is recorded as T2Inputting the data into an upper computer; step three, the upper computer calculates the braking torque of the tractor brake to be T3(ii) a The upper computer sets a first early warning value of the braking torque of a tractor brake in advance as follows: t isx(ii) a When T is3＜TxAnd the upper computer judges that the braking effect of the tractor brake is poor. The invention can accurately judge the braking capacity of the traction machine.
Description
Technical Field
The invention relates to the technical field of elevator maintenance, in particular to an elevator maintenance evaluation method.
Background
The elevator needs to periodically detect elevator components during its daily use, including detecting the operation of the machine, motor, brake, governor, door opening and closing, hoisting ropes, etc. The traction machine is power equipment of the elevator, also called as an elevator main machine, and has the function of conveying and transmitting power to enable the elevator to run.
One end of a traction rope of the elevator is connected with the elevator car through a traction sheave of the traction machine, and the other end of the traction rope is connected with the counterweight of the elevator. A plurality of rope grooves for installing the hoisting ropes are arranged on the traction sheave at intervals, and friction force is generated between the hoisting ropes and the side walls of the rope grooves during the operation of the elevator to continuously wear the rope grooves. If the rope grooves are seriously abraded, the friction force between the hoisting ropes and the rope grooves can be influenced, even the hoisting ropes slip in the rope grooves, and the stable operation of the elevator is influenced. Therefore, the elevator needs to frequently detect the traction sheave of the traction machine.
The existing method judges the abrasion condition of the traction sheave by detecting the size and the shape of a rope groove of the traction sheave, then judges whether the traction sheave can normally work or not and replaces traction sheave equipment in time. The elevator detection method based on big data, which is disclosed in the Chinese patent application publication No. CN112693989A and applied by the applicant at 28.12.2020, can objectively collect the wear condition of each rope groove on the traction sheave, find out problems in time and report the problems.
In the actual elevator maintenance process, the size and the shape of a traction sheave rope groove of some traction machines are judged to be normal, but the braking effect of the traction machine is not good in practice. In other words, there is no universality as a basis for judging whether the traction machine can operate stably only by detecting the abrasion condition of each rope groove on the traction sheave. Based on the method, the invention provides an elevator maintenance evaluation method with universality.
Disclosure of Invention
Therefore, aiming at the problems, the invention provides a universal elevator maintenance evaluation method for judging the braking capacity of the tractor.
In order to achieve the purpose, the invention adopts the following technical scheme: an elevator overhaul evaluation method is used for judging the braking capacity of a traction machine, wherein the traction machine comprises a traction wheel and a traction machine brake for braking the traction wheel, a traction rope is wound on the traction wheel of the traction machine, one end of the traction rope is connected with an elevator car, and the other end of the traction rope is connected with an elevator counterweight;
the traction sheave is connected with an encoder, when the traction sheave rotates, the encoder generates a pulse signal, and the encoder is connected with an upper computer;
the elevator overhaul evaluation method comprises the following steps:
step one, input elevator maintenance parameter value on the host computer, include:
rated output torque T of traction machine0；
An elevator balance coefficient K;
the mass m of the elevator car;
acceleration of gravity g;
multiplying power alpha of a hoisting rope;
the diameter d of the traction sheave;
stopping the elevator car to the same horizontal position as the elevator counterweight; because the quality of elevator car and elevator counterweight is different, when the elevator car is motionless, the host computer calculates the moment of torsion of hauler stopper on the driving sheave:
step two, under the condition that the traction machine brake tightly holds the traction sheave, enabling the torque output by the traction machine to be in the interval [0.5T ]0,1.1T0]Gradually changing from small to large;
when the output pulse signal of the encoder is detected to exceed a preset value, the torque output by the tractor at the moment is recorded as T2Inputting the data into an upper computer;
step three, the upper computer calculates the braking torque of the tractor brake as follows:
the upper computer sets a first early warning value of the braking torque of the traction machine brake in advance as follows:
when T is3＜TxAnd the upper computer judges that the braking effect of the traction machine brake is poor and needs to be maintained immediately.
Further, in the third step, the method further includes:
setting a second early warning value of the braking torque of the traction machine brake as follows:
when T isx≤T3≤TyAnd judging that the braking effect of the tractor brake is in a decline period and maintaining in time.
Further, in the third step, the method further includes: when T is3＞TyAnd the upper computer judges that the braking effect of the traction machine brake is good.
Further, the upper computer is also connected with an audible and visual alarm;
and when the upper computer judges that the braking effect of the tractor brake is poor, the upper computer controls an audible and visual alarm to give an alarm.
Further, the upper computer is also connected with an industrial touch screen, and the industrial touch screen is in communication connection with the upper computer;
and inputting the elevator maintenance parameter value through the industrial touch screen.
By adopting the technical scheme, the invention has the beneficial effects that: the invention provides a universal elevator maintenance evaluation method, which is used for judging the braking capacity of a traction machine. Specifically, the elevator car is stopped to the same horizontal position as the elevator counterweight, so that the weight of a hoisting rope on the elevator car side is equal to that of a hoisting rope on the elevator counterweight side, and the condition that the weight of the hoisting rope on the elevator car side is unequal to that of the hoisting rope on the elevator counterweight side to cause inaccurate overhaul evaluation is avoided.
When the elevator car is still, the upper computer calculates the torque of the traction machine brake on the traction sheave to be T1(ii) a Under the condition that the brake of the traction machine is not opened, the torque output by the traction machine is in the interval of 0.5T0,1.1T0]Gradually changing from small to large, and recording the torque output by the tractor as T when the pulse signal output by the detection encoder exceeds a preset value2。
From T1And T2Calculating to obtain T3＝T1+T2。
Presetting first early warning value T of braking torque by upper computerxAnd a second early warning value T of the braking torquey；
When T is3＜TxThe upper computer judges that the brake effect of the tractor brake is poor and the tractor brake should be maintained immediately;
when T isx≤T3≤TyJudging that the braking effect of the tractor brake is in a decline period and maintaining in time;
when T is3＞TyAnd the upper computer judges that the braking effect of the traction machine brake is good.
The elevator maintenance evaluation method can accurately judge the braking capacity of the traction machine.
Drawings
Fig. 1 is a schematic view of the structure of an elevator of the invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1, the present embodiment provides an elevator maintenance evaluation method for determining a braking capability of a traction machine 100, where the traction machine 100 is an existing device. Specifically, the traction machine 100 includes a traction sheave 101 and a traction machine brake 102 for braking the traction sheave 101.
A traction sheave 101 of the traction machine 100 is wound with a traction rope 200, one end of the traction rope 200 is connected with an elevator car 300, and the other end of the traction rope 200 is connected with an elevator counterweight 400; the above-mentioned arrangement of the traction machine 100, the hoisting rope 200, the elevator car 300 and the elevator counterweight 400 is a conventional technical means in the field, and will not be described in detail herein.
The traction sheave 101 is connected with an encoder 500, when the traction sheave 101 rotates, the encoder 500 generates a pulse signal, the encoder 500 is connected with an upper computer 600, and the upper computer 600 is connected with an acousto-optic alarm 700 and an industrial touch screen 800.
In this embodiment, preferably, the upper computer 600 adopts a siemens S7-200PLC controller. The encoder 500 employs a pulse type encoder. The encoder 500, the upper computer 600, the sound and light alarm 700 and the industrial touch screen 800 are all conventional electronic devices.
The elevator overhaul evaluation method comprises the following steps:
step one, inputting elevator maintenance parameter values to the upper computer 600 through the industrial touch screen 800; the elevator service parameter values include:
rated output torque T of traction machine0；
An elevator balance coefficient K;
the mass m of the elevator car;
acceleration of gravity g;
multiplying power alpha of a hoisting rope;
the diameter d of the traction sheave;
stopping the elevator car 300 to the same horizontal position as the elevator counterweight 400; the weight of the hoisting rope 200 on the side of the elevator car 300 is equal to that of the hoisting rope 200 on the side of the counterweight 400, so that the problem of inaccurate maintenance and evaluation caused by unequal weight of the hoisting rope 200 on the side of the elevator car 300 and the hoisting rope 200 on the side of the counterweight 400 is avoided.
Because the masses of the elevator car 300 and the counterweight 400 are different, when the elevator car 300 is stationary, the upper computer 600 calculates the torque of the hoisting machine brake 102 on the traction sheave 101 as follows:
step two, under the condition that the traction machine brake 102 holds the traction wheel 101 tightly, the torque output by the traction machine 100 is in the interval [0.5T0,1.1T0]Gradually changing from small to large;
when detecting that the pulse signal output by the encoder 500 exceeds a preset value, recording the torque output by the traction machine 100 at the moment as T2Inputting the data into an upper computer 600;
step three, the upper computer 600 calculates the braking torque of the traction machine brake 102 as follows:
the upper computer 600 sets a first early warning value of the braking torque of the traction machine brake 102 in advance as follows:
setting a second early warning value of the braking torque of the traction machine brake as follows:
when T is3＜TxIn the meantime, the upper computer 600 judges that the braking effect of the traction machine brake 102 is bad and should be maintained immediately.
When T isx≤T3≤TyJudging that the braking effect of the traction machine brake 102 is in a decline period and maintaining in time;
when T is3＞TyIn the meantime, the upper computer 600 determines that the braking effect of the traction machine brake 102 is good.
When the upper computer 600 judges that the braking effect of the traction machine brake 102 is poor, the upper computer 600 controls the audible and visual alarm 700 to give an alarm. The elevator maintenance evaluation method can accurately judge the braking capacity of the traction machine 100.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. An elevator overhaul evaluation method is used for judging the braking capacity of a traction machine, wherein the traction machine comprises a traction wheel and a traction machine brake for braking the traction wheel, a traction rope is wound on the traction wheel of the traction machine, one end of the traction rope is connected with an elevator car, and the other end of the traction rope is connected with an elevator counterweight;
the traction sheave is connected with an encoder, when the traction sheave rotates, the encoder generates a pulse signal, and the encoder is connected with an upper computer;
the method is characterized by comprising the following steps:
step one, input elevator maintenance parameter value on the host computer, include:
rated output torque T of traction machine0；
An elevator balance coefficient K;
the mass m of the elevator car;
acceleration of gravity g;
multiplying power alpha of a hoisting rope;
the diameter d of the traction sheave;
stopping the elevator car to the same horizontal position as the elevator counterweight; because the quality of elevator car and elevator counterweight is different, when the elevator car is motionless, the host computer calculates the moment of torsion of hauler stopper on the driving sheave:
step two, under the condition that the traction machine brake tightly holds the traction sheave, enabling the torque output by the traction machine to be in the interval [0.5T ]0,1.1T0]Gradually changing from small to large;
when the output pulse signal of the encoder is detected to exceed a preset value, the torque output by the traction machine at the moment is recorded as T2Inputting the data into an upper computer;
step three, the upper computer calculates the braking torque of the traction machine brake as follows:
the upper computer sets a first early warning value of the braking torque of the traction machine brake in advance as follows:
when T is3＜TxAnd the upper computer judges that the braking effect of the traction machine brake is poor and needs to be maintained immediately.
2. The elevator inspection and evaluation method according to claim 1, wherein in the third step, the method further comprises:
setting a second early warning value of the braking torque of the traction machine brake as follows:
when T isx≤T3≤TyAnd judging that the braking effect of the tractor brake is in a decline period and maintaining in time.
3. The elevator inspection and evaluation method according to claim 2, wherein in the third step, the method further comprises:
when T is3＞TyAnd the upper computer judges that the braking effect of the traction machine brake is good.
4. An elevator service assessment method according to claim 1, 2 or 3, characterized in that: the upper computer is also connected with an audible and visual alarm;
and when the upper computer judges that the brake effect of the tractor brake is poor, the upper computer controls the audible and visual alarm to give an alarm.
5. The elevator inspection and evaluation method according to claim 4, wherein: the upper computer is also connected with an industrial touch screen, and the industrial touch screen is in communication connection with the upper computer;
and inputting the elevator maintenance parameter value through the industrial touch screen.
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| CN202111569687.7A CN114229644A (en) | 2021-12-21 | 2021-12-21 | Elevator maintenance evaluation method |
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| CN202111569687.7A CN114229644A (en) | 2021-12-21 | 2021-12-21 | Elevator maintenance evaluation method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130105248A1 (en) * | 2009-12-11 | 2013-05-02 | Roger Martinelli | Selective elevator braking during emergency stop |
| CN104016200A (en) * | 2014-02-28 | 2014-09-03 | 永大电梯设备（中国）有限公司 | Elevator traction capacity detection method |
| CN107792740A (en) * | 2017-10-27 | 2018-03-13 | 北京意智测控技术有限公司 | Elevator brake abatement detecting method, device, equipment and storage medium |
| CN108147240A (en) * | 2017-12-06 | 2018-06-12 | 天津市特种设备监督检验技术研究院 | A kind of digitized elevator brake ability monitoring and method for early warning |
| CN111217219A (en) * | 2020-01-08 | 2020-06-02 | 长沙纵横电梯工程有限公司 | Elevator braking torque detection method and detection device |
-
2021
- 2021-12-21 CN CN202111569687.7A patent/CN114229644A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130105248A1 (en) * | 2009-12-11 | 2013-05-02 | Roger Martinelli | Selective elevator braking during emergency stop |
| CN104016200A (en) * | 2014-02-28 | 2014-09-03 | 永大电梯设备（中国）有限公司 | Elevator traction capacity detection method |
| CN107792740A (en) * | 2017-10-27 | 2018-03-13 | 北京意智测控技术有限公司 | Elevator brake abatement detecting method, device, equipment and storage medium |
| CN108147240A (en) * | 2017-12-06 | 2018-06-12 | 天津市特种设备监督检验技术研究院 | A kind of digitized elevator brake ability monitoring and method for early warning |
| CN111217219A (en) * | 2020-01-08 | 2020-06-02 | 长沙纵横电梯工程有限公司 | Elevator braking torque detection method and detection device |
Non-Patent Citations (1)
| Title |
|---|
| 龚飞: "曳引式乘客电梯实训教程", 北京：北京理工大学出版社, pages: 147 * |
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