CN103204417B - Elevator drive rope sheave wear detector and method of inspection - Google Patents
Elevator drive rope sheave wear detector and method of inspection Download PDFInfo
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- CN103204417B CN103204417B CN201210008192.1A CN201210008192A CN103204417B CN 103204417 B CN103204417 B CN 103204417B CN 201210008192 A CN201210008192 A CN 201210008192A CN 103204417 B CN103204417 B CN 103204417B
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Abstract
The invention discloses a kind of elevator drive rope sheave wear detector, comprise angular displacement detecting device, displacement of the lines detecting device and the wearing calculation unit for calculating the wearing and tearing of elevator drive rope sheave, the displacement of the lines of the elevator drive rope sheave that the angular transposition of the elevator drive rope sheave that described wearing calculation unit detects according to described angular displacement detecting device and displacement of the lines detecting device detect calculates the actual value of elevator drive rope sheave diameters, and calculates the abrasion loss of elevator drive rope sheave further according to the actual value of this diameter and the nominal value of elevator drive rope sheave diameters.Displacement of the lines in the present invention or angular transposition can change as required, can judge whether to exist between elevator drive rope sheave to elevator drive rope skid, can to elevator drive rope sheave abrasion detection result provide corresponding evaluation, unrestricted to specific region, car place, can wear and tear to elevator drive rope sheave at any time and detect.The invention also discloses a kind of elevator drive rope sheave wear detecting method.
Description
Technical field
The present invention relates to a kind of annex of traction elevator, be specifically related to a kind of elevator drive rope sheave wear detector.The invention still further relates to a kind of elevator drive rope sheave wear detecting method.
Background technology
In long contact friction and possible skidding process, the contact surface of elevator drive rope sheave and rope contact can be worn gradually.The wearing and tearing of elevator drive rope sheave contact surface can reduce friction coefficient between itself and rope on the one hand, increase the frequency of occurrences of skidding, cause braking can not realize the safety problems such as car stopping at once, on the other hand, the undue wear of rope sheave groove also can cause the comparatively big error between the actual radius of rotation of elevator drive rope sheave and its nominal value, thus causes elevator controlling performance (as langding accuracy etc.) to reduce.Therefore, be necessary to detect the wearing and tearing of elevator drive rope sheave, to take suitable counter-measure according to the wear pattern of elevator drive rope sheave.
In order to realize the detection to the wearing and tearing of elevator drive rope sheave, Chinese invention patent application Publication Specification CN102190225A (application number: 201110026434.5, publication date: on 09 21st, 2011) proposes two kinds of elevator drive rope sheave abrasion detection schemes.Scheme one utilizes the stop detection device on car and the multiple portions that are referenced be arranged in hoistway to determine that car moves predetermined reference range, and utilizes pulley rotation amount test section to detect the pulley rotation amount realization of car during described reference range of advancing to the detection of elevator drive rope sheave wearing and tearing.Scheme two utilizes the ratio of the pulse count of velocity limiter coder and drive motor coder to realize the detection of wearing and tearing to elevator drive rope sheave.Reference range in scheme one is predefined, and for different buildings, its reference range is not identical.This reference range is obtained rear by manual measurement in advance and is write in dependent program, or is obtained by a layer process of writing for elevator.The former is for each building, and all need independent measurement, arrange its reference range, this is obviously not easy to organization management, and the on-site measurement error of reference range also can have an impact to the abrasion detection precision of elevator drive rope sheave; Latter depends on elevator and writes layer.In addition, the stop detection device of the program only on specific car just can carry out elevator drive rope sheave abrasion detection through multiple portion of being referenced, and its reference range can not need change according to detection, therefore can not tackle some special occasions flexibly.Although scheme two overcomes the shortcoming of scheme one, it is indirectly obtained by velocity limiter coder to the displacement of the lines of elevator drive rope sheave.Small slippage between overspeed governor and governor sheave, the tensioning degree of overspeed governor and the wearing and tearing etc. of governor sheave all may cause having an impact to final rope sheave loss testing result precision.In addition, whether above-mentioned two schemes is not all considered to exist between elevator drive rope sheave to elevator drive rope and is skidded, can not provide corresponding evaluation to testing result.
Therefore, develop a kind of for all elevators all can set unified reference range can realize to elevator drive rope sheave wearing and tearing high precision test, such as can not evaluating testing result of existing in prior art can be overcome simultaneously, do not rely on elevator and write layer, abrasion detection result precision is low, not consider between elevator drive rope sheave and elevator drive rope may skidding, only when car just can to carry out the elevator drive rope sheave wear detector of the shortcomings such as elevator drive rope sheave wearing and tearing in specific region, just become of realizing elevator drive rope sheave abrasion detection and have important topic to be solved.
Summary of the invention
The technical problem to be solved in the present invention is to provide and a kind ofly all can sets for all elevators the elevator drive rope sheave wear detector of high precision test that unified reference range can realize the wearing and tearing of elevator drive rope sheave, can overcome that existing public technology exists simultaneously such as can not evaluate testing result, do not rely on elevator write layer, abrasion detection result precision low, not consider between elevator drive rope sheave and elevator drive rope may skidding, only when car just can carry out the shortcomings such as elevator drive rope sheave wearing and tearing in specific region.
For solving the problems of the technologies described above, the technical solution of elevator drive rope sheave wear detector of the present invention is:
Comprise angular displacement detecting device, for detecting the angular transposition of elevator drive rope sheave; Displacement of the lines detecting device, for detecting the displacement of the lines of elevator drive rope sheave; Wearing calculation unit, for calculating the wearing and tearing of elevator drive rope sheave; The displacement of the lines of the elevator drive rope sheave that the angular transposition of the elevator drive rope sheave that described wearing calculation unit detects according to described angular displacement detecting device and displacement of the lines detecting device detect calculates the actual value of elevator drive rope sheave diameters, and calculates the abrasion loss of elevator drive rope sheave further according to the actual value of this diameter and the nominal value of elevator drive rope sheave diameters.
The formula that described wearing calculation unit calculates the wearing and tearing of described driving rope sheave is:
D=2d/ θ (formula 1)
△ D=D '-D (formula 2)
△ D%=(D '-D)/D ' × 100% (formula 3)
Wherein, D is the actual value (rice) driving rope sheave diameters, the displacement of the lines (rice) of the elevator drive rope sheave that displacement of the lines detecting device described in d exports, θ is the angular transposition (rad) of the driving rope sheave that angular displacement detecting device detects, D ' is the nominal value (rice) driving rope sheave diameters, and △ D is the abrasion loss driving rope sheave diameters.
Described displacement of the lines detecting device is the rope that links with coded message and with lift car and is fixed on for reading the code reader of coded message on described rope in machine room or hoistway, the detection that code reader can realize elevator drive rope sheave displacement of the lines by the coded message read on rope when car moves.
Or, described displacement of the lines detecting device is be fixed on the yardstick of coded message and the code reader for reading the coded message on strip device be fixed on car in hoistway, and when car is elevated, code reader is by reading the detection of coded message realization to elevator drive rope sheave displacement of the lines on strip device.
Or, described displacement of the lines detecting device comprises a circuit structure and a circuit parameter detecting device, one or more parameters of described circuit structure are run with the rotation of elevator drive rope sheave or the lifting of car and are changed, and described circuit parameter detecting device realizes the detection to elevator drive rope sheave displacement of the lines by the change of the parameter of testing circuit structure.
Described angular displacement detecting device is increment type or the absolute type encoder that can export reflection elevator drive rope sheave rotation amount, or calculated the angular transposition of elevator drive rope sheave by integral operation according to the speed value of elevator drive motor, or utilize sensorless strategy theoretical calculation to go out the cireular frequency of elevator drive motor according to the input of elevator drive motor, output parameter, then after integral operation, calculate the angular transposition of elevator drive rope sheave.
Further, what also comprise in following unit is one or more:
Skidding judging unit, described skidding judging unit judges elevator drive rope sheave according to the testing result of described angular displacement detecting device and drives between rope whether there is skidding;
Wear evaluation unit, the result of calculation of described wear evaluation unit to described wearing calculation unit is evaluated and provides the result of corresponding evaluation.
The present invention also provides a kind of elevator drive rope sheave wear detecting method, and its technical solution is, comprises the steps:
Angular displacement detecting device detects the angular transposition of elevator drive rope sheave;
Displacement of the lines detecting device detects the displacement of the lines of elevator drive rope sheave;
Wearing calculation unit calculates the wearing and tearing of elevator drive rope sheave;
Or comprise following one or more step further:
Skidding judging unit judges elevator drive rope sheave and drives between rope whether there is skidding;
The result of calculation of wear evaluation unit to described wearing calculation unit is evaluated and is provided the wear evaluation unit of corresponding evaluation result.
Described displacement of the lines detecting device is displacement by detecting the car doing dipping and heaving with the rotation of elevator drive rope sheave in hoistway or the displacement of the rope of movement realizes the detection to elevator drive rope sheave displacement of the lines with the rotation of elevator drive rope sheave.
The displacement of the lines of the elevator drive rope sheave that the angular transposition of the elevator drive rope sheave that described wearing calculation unit detects according to described angular displacement detecting device and described displacement of the lines detecting device detect calculates the actual value of elevator drive rope sheave diameters, and calculates the abrasion loss of elevator drive rope sheave further according to the actual value of this diameter and the nominal value of elevator drive rope sheave diameters.
Following principal and subordinate's matching relationship is there is between the testing process of described angular transposition and the testing process of described displacement of the lines:
1st kind: based on Angular Displacement Detecting, displacement of the lines is detected as auxiliary, even if elevator drive rope sheave rotates certain angular transposition, described displacement of the lines detecting device detects elevator drive rope sheave displacement of the lines corresponding in the process rotating through above-mentioned angular transposition, now, angular transposition is independent variable, the function of displacement of the lines to be angular transposition be variable;
Or the 2nd kind: it is auxiliary for being detected as main, Angular Displacement Detecting with displacement of the lines, even if elevator drive rope sheave turns over certain displacement of the lines, described angular displacement detecting device is utilized to detect elevator drive rope sheave angular transposition corresponding in the process turning over above-mentioned displacement of the lines, now, displacement of the lines is independent variable, the function of angular transposition to be displacement of the lines be variable.
In the testing process of carrying out described displacement of the lines and described angular transposition, elevator speed, cireular frequency, direction and load remain unchanged.
In the testing process of carrying out described displacement of the lines and angular transposition, if the detection of described angular displacement detecting device exports and the detection of described displacement of the lines detecting device exports when there is certain priority, then later start time or front stop timing are as start time of displacement of the lines and Angular Displacement Detecting or stop timing.
Described skidding judging unit judges elevator drive rope sheave according to following method and drives between rope whether there is skidding:
Method 1: the anglec of rotation of the calculated with actual values elevator drive rope sheave of the elevator drive rope sheave diameters obtained according to the testing result of described displacement of the lines detecting device and the nominal value of elevator drive rope sheave diameters or wearing calculation unit, and the testing result of this anglec of rotation and described angular displacement detecting device is compared, when difference between the two exceedes predetermined threshold value, then judge to exist between elevator drive rope sheave and driving rope to skid;
Or method 2: the displacement of the lines of the calculated with actual values elevator drive rope sheave of the elevator drive rope sheave diameters obtained according to the testing result of described angular displacement detecting device and the nominal value of elevator drive rope sheave diameters or wearing calculation unit, and the testing result of this displacement of the lines and described displacement of the lines detecting device is compared, when difference between the two exceedes predetermined threshold value, then judge to exist between elevator drive rope sheave and driving rope to skid.
Described threshold value is the steady state value preset, or with the monotonic increasing function that the displacement of the lines of elevator drive rope sheave or angular transposition are independent variable.
Described wear evaluation unit is evaluated according to the result of calculation of the critical for the evaluation preset to described wearing calculation unit, and provide corresponding evaluation result, described critical for the evaluation is the regional computer index of multistage, the result of calculation of described abrasion detection calculating unit is positioned at a certain interval, and described wear evaluation unit then generates the evaluation result corresponding to this interval.
Occur in following situation one or more time, it is invalid that the result of calculation of described wearing calculation unit is evaluated as by described wear evaluation unit:
Described skidding judging unit judges to exist between elevator drive rope sheave and elevator drive rope to skid;
Elevator drive rope sheave abrasion loss this and last time testing result difference exceed certain threshold value.
The beneficial effect that the present invention can reach is:
1) displacement of the lines in testing process or angular transposition can change as required;
2) can judge whether there is skidding between elevator drive rope sheave and elevator drive rope;
3) corresponding evaluation can be provided to elevator drive rope sheave abrasion detection result;
4) unrestricted to specific region, car place;
5) can detect the wearing and tearing of elevator drive rope sheave at any time.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the first embodiment of elevator drive rope sheave wear detector of the present invention;
Fig. 2 is the overall structure schematic diagram of the second embodiment of elevator drive rope sheave wear detector of the present invention;
Fig. 3 is the overall structure schematic diagram of the third embodiment of elevator drive rope sheave wear detector of the present invention.
Nomenclature in figure:
1, drive rope sheave 2, drive rope sheave coder 3, governor sheave
5, track adjusting wheel 6, driving rope 7, overspeed governor
8, car 9, counterweight 10, tension wheel
11, car buffer 12, counterweight buffer 13, yardstick
14, code reader
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is further detailed explanation:
Detailed description of the invention
Embodiment one
The overall structure schematic diagram of the first embodiment of elevator drive rope sheave wear detector of the present invention shown in Figure 1, the wearing calculation unit that described elevator drive rope sheave wear detector comprises angular displacement detecting device for detecting elevator drive rope sheave angular transposition (driving rope sheave coder 2), the elevator drive rope sheave displacement of the lines that detects for detecting the displacement of the lines detecting device (code reader 14 and yardstick 13) of elevator drive rope sheave displacement of the lines and the elevator drive rope sheave angular transposition detected according to described angular displacement detecting device and displacement of the lines detecting device calculates the wearing and tearing of elevator drive rope sheave.Car 8 and counterweight 9 are suspended in elevator hoistways through driving rope sheave 1 and track adjusting wheel 5 by driving rope 6.Car buffer 11 and counterweight buffer 12 is respectively arranged with immediately below car 8 and counterweight 9.Car 8 drives overspeed governor 7 to be synchronized with the movement by a bindiny mechanism, and overspeed governor 7 is suspended in midair by governor sheave 3 and tension wheel 10.Displacement of the lines detecting device is formed for the code reader 14 reading the coded message on strip device with being fixed on car 8 by being fixed in hoistway and with the yardstick 13 of coded message.
Elevator drive motor (not shown) drives rope sheave 1 to rotate and utilizes to drive the pulley groove of rope sheave 1 and drive the friction between rope 6 to make to drive rope 6 to move and makes car 8 do dipping and heaving in hoistway, code reader 14 by detecting the coded message determination lift car displacement on yardstick 13, thus realizes the detection to the displacement of the lines of elevator drive rope sheave 1 indirectly.
Described angular displacement detecting device is exportable increment type or the absolute type encoder that can reflect elevator drive rope sheave rotation amount, this coder is installed on elevator drive rope sheave 1 or drive motor, can be conventional optical-electricity encoder, also can be the magnetic coder based on magnetic principles.
Following principal and subordinate's matching relationship is there is between the process of described displacement of the lines detecting device detection line displacement and the process of described angular displacement detecting device detection angle displacement:
1st kind: based on Angular Displacement Detecting, displacement of the lines is detected as auxiliary, even if elevator drive rope sheave 1 rotates certain angular transposition, described displacement of the lines detecting device detects elevator drive rope sheave 1 displacement of the lines corresponding in the process rotating through above-mentioned angular transposition, now, angular transposition is independent variable, the function of displacement of the lines to be angular transposition be variable;
2nd kind: it is auxiliary for being detected as main, Angular Displacement Detecting with displacement of the lines, even if elevator drive rope sheave 1 turns over certain displacement of the lines, described angular displacement detecting device is utilized to detect elevator drive rope sheave 1 angular transposition corresponding in the process turning over above-mentioned displacement of the lines, now, displacement of the lines is independent variable, the function of angular transposition to be displacement of the lines be variable.
Obviously, there is corresponding relation between the angular transposition that the displacement of the lines detected with elevator drive rope sheave abrasion detection center line displacement detector and angular displacement detecting device detect.
In order to improve the order of accuarcy of elevator drive rope sheave abrasion detection result, can in the testing process of carrying out displacement of the lines and angular transposition, elevator speed, cireular frequency, direction and load be remained unchanged, or in the testing process of displacement of the lines and angular transposition, include elevator when starting or stoping process, due to the existence of mechanical clearance etc., certain priority may be there is in the start time that the detection of displacement of the lines and angular transposition exports or stop timing, now should later start time or front stop timing as start time of displacement of the lines and Angular Displacement Detecting or stop timing.
The displacement of the lines of the elevator drive rope sheave that the angular transposition of the elevator drive rope sheave that described wearing calculation unit detects according to described angular displacement detecting device and described displacement of the lines detecting device detect calculates the actual value of elevator drive rope sheave diameters, and calculates the abrasion loss of elevator drive rope sheave further according to the actual value of this diameter and the nominal value of elevator drive rope sheave diameters;
Described angular displacement detecting device, namely the driving rope sheave coder 2 in the present embodiment, with described displacement of the lines detecting device, the code reader 14 namely in the present embodiment and yardstick 13, the output of the two is sent to the wearing calculation unit worn and torn for calculating elevator drive rope sheave as incoming signal.The displacement of the lines of the elevator drive rope sheave that the angular transposition of the elevator drive rope sheave that described wearing calculation unit detects according to described angular displacement detecting device and described displacement of the lines detecting device detect calculates the actual value of elevator drive rope sheave diameters, and the abrasion loss of elevator drive rope sheave is calculated further according to the actual value of this diameter and the nominal value of elevator drive rope sheave diameters, its concrete computation process is as follows:
D=2d/ θ (formula 1)
△ D=D '-D (formula 2)
Or
△ D%=(D '-D)/D ' × 100% (formula 3)
Wherein, D is the actual value (rice) of elevator drive rope sheave diameters, d is the displacement of the lines (rice) of the elevator drive rope sheave that described displacement of the lines detecting device (code reader 14 and yardstick 13) exports, θ is the angular transposition (rad) of the elevator drive rope sheave that angular displacement detecting device (driving rope sheave coder 2) detects, D ' is the nominal value (rice) of elevator drive rope sheave diameters, and △ D is the abrasion loss of elevator drive rope sheave diameters.
The abrasion loss of the elevator drive rope sheave diameters calculated is exported to wear evaluation unit and/or safety return circuit and/or elevator main controller by described wearing calculation unit, for display or take suitable treatment measures, such as generate repair and maintenance information, elevator is stopped nearby, display etc.
In order to improve safety, the reliability of system, the individual code reader 14 of n (n >=2) can be set and/or drive rope sheave coder 2 to form hardware redundancy.
The present embodiment center line displacement detector is displacement by detecting the car doing dipping and heaving with the rotation of elevator drive rope sheave in hoistway or the displacement of the rope of movement realizes the detection to elevator drive rope sheave displacement of the lines with the rotation of elevator drive rope sheave.Except above-mentioned implementation, displacement of the lines detecting device can also adopt following way of realization:
√ is used for driving rope or the ribbon band of suspension craning cab and counterweight, or the rope be installed on velocity limiter or ribbon band, or even the special rope that arranges or ribbon band, there is coded message its surface or inside, this coded message can be punching form, based on one or more in the coding of the form such as coding or discernible mark of magnetic principles, code reader is then arranged at can the position of the correct above-mentioned coded message of reading code;
√ comprises a circuit structure and a circuit parameter detecting device, one or more parameters of described circuit structure are run with the rotation of elevator drive rope sheave or the lifting of car and are changed, and described circuit parameter detecting device realizes the detection to elevator drive rope sheave displacement of the lines by the change of testing circuit construction parameter.
Angular displacement detecting device in the present embodiment can also be the angular transposition being calculated elevator drive rope sheave according to the speed value of elevator drive motor by integral operation, or utilize sensorless strategy theoretical calculation to go out the cireular frequency of elevator drive motor according to the input of elevator drive motor, output parameter, then after integral operation, calculate the angular transposition of elevator drive rope sheave.
Because the detection of displacement of the lines in the present embodiment can be carried out at any time, to the no requirement (NR) of lift car region, therefore can detect the wearing and tearing of elevator drive rope sheave at any time.
Embodiment 2
The overall structure schematic diagram of the second embodiment of elevator drive rope sheave wear detector of the present invention shown in Figure 2, be to add for evaluating the result of calculation of described abrasion detection calculating unit and providing the wear evaluation unit of corresponding evaluation result to the difference of embodiment 1, only just do not exist together with embodiment 1 below and be illustrated.
For the wear evaluation unit evaluated the result of calculation of described wearing calculation unit, evaluate according to the result of calculation of the critical for the evaluation preset to described wearing calculation unit, and provide corresponding evaluation result.Described critical for the evaluation is the regional computer index of multistage, as: the allowed band of elevator drive rope sheave diameters is 0 ~ △ D
max, then can as required by 0 ~ △ D
maxbe divided into n (n>=2) individual interval, i.e. 0 ~ △ D
max1, △ D
max1~ △ D
max2..., △ D
maxn-1~ △ D
maxn, be then respectively each interval name, as first, second etc., or without wearing and tearing, mild wear, generally wearing and tearing, noticeable wear, severe wear etc.For the result of calculation provided by formula 3, set up the regional computer index of similar multistage with reference to above-mentioned equally.
First the result of calculation of described wearing calculation unit inquire about the regional computer index of above-mentioned multistage by described wear evaluation unit, see which interval it drops in, then corresponding interval title is determined, namely this interval title can be used as the evaluation result of described wear evaluation unit, the evaluation result that last described wear evaluation unit is drawn exports safety return circuit and/or elevator main controller to, for display or take suitable treatment measures, such as generate repair and maintenance information, elevator is stopped nearby, display etc.
Embodiment 3
The overall structure schematic diagram of the third embodiment of elevator drive rope sheave wear detector of the present invention shown in Figure 3, and the difference of embodiment 2 is that the testing result added according to described angular displacement detecting device and described displacement of the lines detecting device judges elevator drive rope sheave and drives the skidding judging unit that whether there is skidding between rope, does not only just exist together with embodiment 2 and is illustrated below.
Skidding judging unit judges elevator drive rope sheave according to one or more methods following and drives between rope whether there is skidding:
Method 1: the displacement of the lines of the elevator drive rope sheave utilizing described displacement of the lines detecting device to detect and the nominal value of elevator drive rope sheave diameters calculate the anglec of rotation of elevator drive rope sheave, and the testing result of this anglec of rotation and described angular displacement detecting device is compared, when difference between the two exceedes predetermined threshold value, then judge to exist between elevator drive rope sheave and driving rope to skid;
Method 2: the anglec of rotation of the calculated with actual values elevator drive rope sheave of the elevator drive rope sheave diameters detected before the displacement of the lines of the elevator drive rope sheave utilizing described displacement of the lines detecting device to detect and elevator drive rope sheave wear detector, and the testing result of this anglec of rotation and described angular displacement detecting device is compared, when difference between the two exceedes predetermined threshold value, then judge to exist between elevator drive rope sheave and driving rope to skid;
Method 3: the displacement of the lines calculating elevator drive rope sheave according to the testing result of described angular displacement detecting device and the nominal value of elevator drive rope sheave diameters, and the displacement of the lines of the elevator drive rope sheave this displacement of the lines and described displacement of the lines detecting device detected compares, when difference between the two exceedes predetermined threshold value, then judge to exist between elevator drive rope sheave and driving rope to skid;
Method 4: according to the displacement of the lines of the calculated with actual values elevator drive rope sheave of the elevator drive rope sheave diameters detected before the testing result of described angular displacement detecting device and elevator drive rope sheave wear detector, and the displacement of the lines of the elevator drive rope sheave this displacement of the lines and described displacement of the lines detecting device detected compares, when difference between the two exceedes predetermined threshold value, then judge to exist between elevator drive rope sheave and driving rope to skid.
Method for optimizing is method 2 and method 4.
In above-mentioned skidding determination methods 1 ~ 4, described threshold value is the steady state value preset, or with the monotonic increasing function that the displacement of the lines of elevator drive rope sheave or angular transposition are independent variable.
The result of determination of skidding judging unit is sent to wear evaluation unit as input.Following two kinds feasible under, it is invalid that the result of calculation of described wearing calculation unit is evaluated as by described wear evaluation unit:
√ when described skidding judging unit judges to exist between elevator drive rope sheave and elevator drive rope skid time;
√ when elevator drive rope sheave wear detector this testing result and last time testing result difference exceed certain threshold value time.
After described wear evaluation unit confirms that the result of calculation of described wearing calculation unit is effective, the result of calculation of described wearing calculation unit directly can be delivered to safety return circuit and/or elevator main controller by described wear evaluation unit, for showing or taking suitable treatment measures, such as generate repair and maintenance information, elevator is stopped nearby, display etc., or the Function of Evaluation of carrying out further in embodiment 2, and then export result to safety return circuit and/or elevator main controller, for showing or taking suitable treatment measures, such as generate repair and maintenance information, elevator is stopped nearby, display etc.
Claims (19)
1. an elevator drive rope sheave wear detector, is characterized in that, comprises
Angular displacement detecting device, for detecting the angular transposition of elevator drive rope sheave;
Displacement of the lines detecting device, for detecting the displacement of the lines of elevator drive rope sheave;
Wearing calculation unit, for calculating the wearing and tearing of elevator drive rope sheave;
The displacement of the lines of the elevator drive rope sheave that the angular transposition of the elevator drive rope sheave that described wearing calculation unit detects according to described angular displacement detecting device and displacement of the lines detecting device detect calculates the actual value of elevator drive rope sheave diameters, and calculates the abrasion loss of elevator drive rope sheave further according to the actual value of this diameter and the nominal value of elevator drive rope sheave diameters;
Described displacement of the lines detecting device is the rope that links with coded message and with lift car and is fixed on for reading the code reader of coded message on described rope in machine room or hoistway, the detection that code reader can realize elevator drive rope sheave displacement of the lines by the coded message read on rope when car moves;
Or, described displacement of the lines detecting device is be fixed on the yardstick of coded message and the code reader for reading the coded message on strip device be fixed on car in hoistway, and when car is elevated, code reader is by reading the detection of coded message realization to elevator drive rope sheave displacement of the lines on strip device;
Or, described displacement of the lines detecting device comprises a circuit structure and a circuit parameter detecting device, one or more parameters of described circuit structure are run with the rotation of elevator drive rope sheave or the lifting of car and are changed, and described circuit parameter detecting device realizes the detection to elevator drive rope sheave displacement of the lines by the change of the parameter of testing circuit structure;
Or, described angular displacement detecting device is increment type or the absolute type encoder that can export reflection elevator drive rope sheave rotation amount, or calculated the angular transposition of elevator drive rope sheave by integral operation according to the speed value of elevator drive motor, or utilize sensorless strategy theoretical calculation to go out the cireular frequency of elevator drive motor according to the input of elevator drive motor, output parameter, then after integral operation, calculate the angular transposition of elevator drive rope sheave.
2. elevator drive rope sheave wear detector according to claim 1, is characterized in that, the formula that described wearing calculation unit calculates the wearing and tearing of described driving rope sheave is:
D=2d/ θ (formula 1)
△ D=D '-D (formula 2)
△ D%=(D '-D)/D ' × 100% (formula 3)
Wherein, D is the actual value (rice) driving rope sheave diameters, d is the displacement of the lines (rice) of the elevator drive rope sheave that described displacement of the lines detecting device exports, θ is the angular transposition (rad) of the driving rope sheave that angular displacement detecting device detects, D ' is the nominal value (rice) driving rope sheave diameters, and △ D is the abrasion loss driving rope sheave diameters.
3. elevator drive rope sheave wear detector according to claim 1, is characterized in that, what also comprise in following unit is one or more:
Skidding judging unit, described skidding judging unit judges elevator drive rope sheave according to the testing result of described angular displacement detecting device and drives between rope whether there is skidding;
Wear evaluation unit, the result of calculation of described wear evaluation unit to described wearing calculation unit is evaluated and provides corresponding evaluation result.
4. an elevator drive rope sheave wear detecting method for elevator drive rope sheave wear detector, described elevator drive rope sheave wear detector comprises
Angular displacement detecting device, for detecting the angular transposition of elevator drive rope sheave;
Displacement of the lines detecting device, for detecting the displacement of the lines of elevator drive rope sheave;
Wearing calculation unit, for calculating the wearing and tearing of elevator drive rope sheave;
The displacement of the lines of the elevator drive rope sheave that the angular transposition of the elevator drive rope sheave that described wearing calculation unit detects according to described angular displacement detecting device and displacement of the lines detecting device detect calculates the actual value of elevator drive rope sheave diameters, and calculates the abrasion loss of elevator drive rope sheave further according to the actual value of this diameter and the nominal value of elevator drive rope sheave diameters; It is characterized in that,
Comprise the steps:
Angular displacement detecting device detects the angular transposition of elevator drive rope sheave;
Displacement of the lines detecting device detects the displacement of the lines of elevator drive rope sheave;
Wearing calculation unit calculates the wearing and tearing of elevator drive rope sheave;
Or comprise following one or more step further:
Skidding judging unit judges elevator drive rope sheave and drives between rope whether there is skidding;
The result of calculation of wear evaluation unit to described wearing calculation unit is evaluated and provides corresponding evaluation result;
Following principal and subordinate's matching relationship is there is between the testing process of described angular transposition and the testing process of described displacement of the lines:
1st kind: based on Angular Displacement Detecting, displacement of the lines is detected as auxiliary, even if elevator drive rope sheave rotates certain angular transposition, described displacement of the lines detecting device detects elevator drive rope sheave displacement of the lines corresponding in the process rotating through above-mentioned angular transposition, now, angular transposition is independent variable, the function of displacement of the lines to be angular transposition be variable; Or
2nd kind: it is auxiliary for being detected as main, Angular Displacement Detecting with displacement of the lines, even if elevator drive rope sheave turns over certain displacement of the lines, described angular displacement detecting device is utilized to detect elevator drive rope sheave angular transposition corresponding in the process turning over above-mentioned displacement of the lines, now, displacement of the lines is independent variable, the function of angular transposition to be displacement of the lines be variable.
5. elevator drive rope sheave wear detecting method according to claim 4, it is characterized in that, described displacement of the lines detecting device is displacement by detecting the car doing dipping and heaving with the rotation of elevator drive rope sheave in hoistway or the displacement of the rope of movement realizes the detection to elevator drive rope sheave displacement of the lines with the rotation of elevator drive rope sheave.
6. elevator drive rope sheave wear detecting method according to claim 4, it is characterized in that, the displacement of the lines of the elevator drive rope sheave that the angular transposition of the elevator drive rope sheave that described wearing calculation unit detects according to described angular displacement detecting device and described displacement of the lines detecting device detect calculates the actual value of elevator drive rope sheave diameters, and calculates the abrasion loss of elevator drive rope sheave further according to the actual value of this diameter and the nominal value of elevator drive rope sheave diameters.
7. elevator drive rope sheave wear detecting method according to claim 4, is characterized in that, in the testing process of carrying out described displacement of the lines and described angular transposition, elevator speed, cireular frequency, direction and load remain unchanged.
8. elevator drive rope sheave wear detecting method according to claim 4, is characterized in that, described skidding judging unit judges elevator drive rope sheave according to following method and drives between rope whether there is skidding:
Method 1: the anglec of rotation of the calculated with actual values elevator drive rope sheave of the elevator drive rope sheave diameters obtained according to the testing result of described displacement of the lines detecting device and the nominal value of elevator drive rope sheave diameters or wearing calculation unit, and the testing result of this anglec of rotation and described angular displacement detecting device is compared, when difference between the two exceedes predetermined threshold value, then judge to exist between elevator drive rope sheave and driving rope to skid; Or
Method 2: the displacement of the lines of the calculated with actual values elevator drive rope sheave of the elevator drive rope sheave diameters obtained according to the testing result of described angular displacement detecting device and the nominal value of elevator drive rope sheave diameters or wearing calculation unit, and the testing result of this displacement of the lines and described displacement of the lines detecting device is compared, when difference between the two exceedes predetermined threshold value, then judge to exist between elevator drive rope sheave and driving rope to skid.
9. elevator drive rope sheave wear detecting method according to claim 8, is characterized in that, described threshold value is the steady state value preset, or with the monotonic increasing function that the displacement of the lines of elevator drive rope sheave or angular transposition are independent variable.
10. elevator drive rope sheave wear detecting method according to claim 4, it is characterized in that, described wear evaluation unit is evaluated according to the result of calculation of the critical for the evaluation preset to described wearing calculation unit, and provide corresponding evaluation result, described critical for the evaluation is the regional computer index of multistage, the result of calculation of described wearing calculation unit is positioned at a certain interval, and described wear evaluation unit then generates the evaluation result corresponding to this interval.
11. elevator drive rope sheave wear detecting methods according to claim 4, is characterized in that, occur in following situation one or more time, it is invalid that the result of calculation of described wearing calculation unit is evaluated as by described wear evaluation unit:
Described skidding judging unit judges to exist between elevator drive rope sheave and elevator drive rope to skid;
Elevator drive rope sheave abrasion loss this and last time testing result difference exceed certain threshold value.
The elevator drive rope sheave wear detecting method of 12. 1 kinds of elevator drive rope sheave wear detectors, described elevator drive rope sheave wear detector comprises
Angular displacement detecting device, for detecting the angular transposition of elevator drive rope sheave;
Displacement of the lines detecting device, for detecting the displacement of the lines of elevator drive rope sheave;
Wearing calculation unit, for calculating the wearing and tearing of elevator drive rope sheave;
The displacement of the lines of the elevator drive rope sheave that the angular transposition of the elevator drive rope sheave that described wearing calculation unit detects according to described angular displacement detecting device and displacement of the lines detecting device detect calculates the actual value of elevator drive rope sheave diameters, and calculates the abrasion loss of elevator drive rope sheave further according to the actual value of this diameter and the nominal value of elevator drive rope sheave diameters; It is characterized in that,
Comprise the steps:
Angular displacement detecting device detects the angular transposition of elevator drive rope sheave;
Displacement of the lines detecting device detects the displacement of the lines of elevator drive rope sheave;
Wearing calculation unit calculates the wearing and tearing of elevator drive rope sheave;
Or comprise following one or more step further:
Skidding judging unit judges elevator drive rope sheave and drives between rope whether there is skidding;
The result of calculation of wear evaluation unit to described wearing calculation unit is evaluated and provides corresponding evaluation result;
In the testing process of carrying out described displacement of the lines and angular transposition, if the detection of described angular displacement detecting device exports and the detection of described displacement of the lines detecting device exports when there is certain priority, then later start time or front stop timing are as start time of displacement of the lines and Angular Displacement Detecting or stop timing.
13. elevator drive rope sheave wear detecting methods according to claim 12, it is characterized in that, described displacement of the lines detecting device is displacement by detecting the car doing dipping and heaving with the rotation of elevator drive rope sheave in hoistway or the displacement of the rope of movement realizes the detection to elevator drive rope sheave displacement of the lines with the rotation of elevator drive rope sheave.
14. elevator drive rope sheave wear detecting methods according to claim 12, it is characterized in that, the displacement of the lines of the elevator drive rope sheave that the angular transposition of the elevator drive rope sheave that described wearing calculation unit detects according to described angular displacement detecting device and described displacement of the lines detecting device detect calculates the actual value of elevator drive rope sheave diameters, and calculates the abrasion loss of elevator drive rope sheave further according to the actual value of this diameter and the nominal value of elevator drive rope sheave diameters.
15. elevator drive rope sheave wear detecting methods according to claim 12, it is characterized in that, in the testing process of carrying out described displacement of the lines and described angular transposition, elevator speed, cireular frequency, direction and load remain unchanged.
16. elevator drive rope sheave wear detecting methods according to claim 12, is characterized in that, described skidding judging unit judges elevator drive rope sheave according to following method and drives between rope whether there is skidding:
Method 1: the anglec of rotation of the calculated with actual values elevator drive rope sheave of the elevator drive rope sheave diameters obtained according to the testing result of described displacement of the lines detecting device and the nominal value of elevator drive rope sheave diameters or wearing calculation unit, and the testing result of this anglec of rotation and described angular displacement detecting device is compared, when difference between the two exceedes predetermined threshold value, then judge to exist between elevator drive rope sheave and driving rope to skid; Or
Method 2: the displacement of the lines of the calculated with actual values elevator drive rope sheave of the elevator drive rope sheave diameters obtained according to the testing result of described angular displacement detecting device and the nominal value of elevator drive rope sheave diameters or wearing calculation unit, and the testing result of this displacement of the lines and described displacement of the lines detecting device is compared, when difference between the two exceedes predetermined threshold value, then judge to exist between elevator drive rope sheave and driving rope to skid.
17. elevator drive rope sheave wear detecting methods according to claim 16, it is characterized in that, described threshold value is the steady state value preset, or with the monotonic increasing function that the displacement of the lines of elevator drive rope sheave or angular transposition are independent variable.
18. elevator drive rope sheave wear detecting methods according to claim 12, it is characterized in that, described wear evaluation unit is evaluated according to the result of calculation of the critical for the evaluation preset to described wearing calculation unit, and provide corresponding evaluation result, described critical for the evaluation is the regional computer index of multistage, the result of calculation of described wearing calculation unit is positioned at a certain interval, and described wear evaluation unit then generates the evaluation result corresponding to this interval.
19. elevator drive rope sheave wear detecting methods according to claim 12, is characterized in that, occur in following situation one or more time, it is invalid that the result of calculation of described wearing calculation unit is evaluated as by described wear evaluation unit:
Described skidding judging unit judges to exist between elevator drive rope sheave and elevator drive rope to skid;
Elevator drive rope sheave abrasion loss this and last time testing result difference exceed certain threshold value.
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