Multi-car intelligent parallel elevator force load dynamic adjustment method

Abstract

The application discloses a kind of dynamic adjustment methods of force load of multiple-car intelligent parallel elevator, elevator system includes multiple cars, at least two main tracks and switching track, the switching track is used to link two different main tracks, car is equipped with driving device, the car has no traction mechanism, the driving device generates force load and drives car operation, the dynamic adjustment method includes the following steps:1) the weight information of car and the real-time force load of car are acquired in real time;2) according to the weight information of car, reserve safety margin, calculate the safe force load of car;3) compare the difference of real-time force load and safe force load, adjust the force load of driving device according to safe force load, so that the output load of driving device is equal to safe force load.The dynamic adjustment method of the application, real-time dynamic adjustment force load, under the premise of guaranteeing the reliability and safety of normal driving, operation of elevator, can also improve the comprehensive efficiency and economic practicality of elevator operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of elevator operation control, in particular to a force load dynamic adjustment method for a multi-car intelligent parallel elevator. BACKGROUND

[0002] At present, the elevator car widely adopts the steel wire rope traction driving mode, and the elevator can only be provided with one car in one shaft. The single-car operation mode elevator can still meet the use demand in low-rise buildings or low-traffic occasions, but the long waiting time and low conveying efficiency of the elevator are significantly magnified in high-rise buildings or super high-rise buildings with high population density. If the elevator shaft and the corresponding car are increased, the building space will be greatly occupied, the cost will be significantly increased, and the problem of low conveying efficiency of the elevator still exists.

[0003] With the continuous development of engineering technology, modes such as double-car elevators, double-car elevators, ring-type or bifurcated ring-type elevators and the like have gradually appeared, but the known multi-car elevator operation modes have the cars located on the same track in the same shaft, the elevator cars between the shafts cannot be switched and operated, and the cars cannot be overtaken, so that in the case of a sharp increase in the transportation capacity, the current multi-car operation mode not only greatly reduces the space utilization rate of the building, but also does not fundamentally solve the problem of low conveying efficiency of the elevator.

[0004] The multi-car intelligent parallel elevator researched by the applicant is a self-driven elevator, and the driving device needs an external force applying mechanism to press the driving wheel and the guide rail to generate a friction driving force. The load applied by the force applying mechanism directly determines the size of the friction driving force. If the force applying load is too small, the driving force will be too small, which may cause the elevator to be unable to be driven or even to slide, affecting the reliability and safety of the elevator operation. If the force applying load is too large, the system operation resistance will be increased, the comprehensive driving efficiency will be reduced, and the economic practicability of the elevator system will be affected. SUMMARY

[0005] The technical problem to be solved by the present application is that, in view of the technical problems existing in the prior art, the present application provides a force load dynamic adjustment method for a multi-car intelligent parallel elevator, which dynamically adjusts the force applying load in real time, so that the driving force generated thereby is appropriately greater than the driving force required by the weight of the car. Under the premise of ensuring the reliability and safety of the normal driving and operation of the elevator, the comprehensive efficiency and economic practicability of the elevator operation can also be improved.

[0006] To solve the above technical problems, the technical solution provided by the present application is as follows:

[0007] A multi-car intelligent parallel elevator force load dynamic adjustment method, the elevator system comprises a plurality of cars, at least two main tracks and switching tracks, the switching tracks are provided with a plurality of, the switching tracks are used to link two different main tracks, the car switches the main track through the switching track to continue to go up or down in the process of going up or down, the car is provided with a driving device, the car is without a traction mechanism, the driving device generates a force load to drive the car to run, the dynamic adjustment method comprises the following steps:

[0008] 1) Real-time acquisition of the weight information of the car and the real-time force load of the car;

[0009] 2) Reserving a safety margin according to the weight information of the car, calculating the safe force load of the car;

[0010] 3) Comparing the difference between the real-time force load and the safe force load, adjusting the force load of the driving device according to the safe force load, so that the output load of the driving device is equal to the safe force load.

[0011] As a further improvement of the above technical solution:

[0012] In the above method, preferably, the car weight information includes the self-weight of the car and the load of the car.

[0013] In the above method, preferably, the load of the car is a variable value, and the change position of the car load includes a flat layer position and a track change position.

[0014] In the above method, preferably, the weight data A of the car is dynamically and real-timely acquired, at least including the following three states:

[0015] 1) When the car is empty: the real-time weight data A of the car = P, P is the self-weight of the car;

[0016] 2) When the passenger load changes on the flat layer position: the real-time weight data A of the car = P+Q;

[0017] 3) When the car runs along the switching track: the real-time weight data A of the car = (P+Q)cosθ, θ is the included angle between the switching track and the main track.

[0018] In the above method, preferably, the safe force load C, B=k*C*μ,

[0019] Wherein, k is a safety factor, k≥1;

[0020] μ is the friction coefficient between the driving device and the main track or the switching track;

[0021] B is the driving force required by the weight data A of the car.

[0022] In the above method, preferably, the calculation formula of the required driving force B of the weight data A of the car is: B=A(g+a)

[0023] wherein,

[0024] g is 9.8 Newtons / Kilogram;

[0025] a is acceleration.

[0026] The multi-car intelligent parallel elevator force loading dynamic adjustment method provided by the application has the following advantages compared with the prior art:

[0027] The multi-car intelligent parallel elevator force loading dynamic adjustment method provided by the application, through the weight information of the car and the real-time force loading of the car, dynamically adjusts the force loading in real time, so that the driving force generated by the driving device is appropriately greater than the driving force required by the weight of the car, thereby ensuring the reliability and safety of the normal driving and operation of the elevator, and improving the comprehensive efficiency and economic practicability of the elevator operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a flowchart of the application. DETAILED DESCRIPTION

[0029] The specific embodiments of the application are described in detail below. It should be understood that the specific embodiments described herein are only used to illustrate and explain the application, and are not used to limit the application.

[0030] Figure 1 An embodiment of the multi-car intelligent parallel elevator force loading dynamic adjustment method provided by the application is shown. The elevator system includes multiple cars, at least two main tracks and switching tracks. Multiple main tracks form parallel tracks, and one main track is arranged in each shaft. Multiple switching tracks are provided, and the switching tracks are arranged between two main tracks and used to connect the two main tracks. Multiple cars can run on the same main track, and the cars continue to go up or down by switching the main track through the switching track during the up or down process. The structure of the elevator system has been described in the patent applied by the applicant.

[0031] In this embodiment, the switching track includes two arc-shaped tracks and an inclined track. The arc-shaped tracks are used to connect the main tracks, and the inclined track is used to connect the two arc-shaped tracks. The car is provided with a driving device, and the driving device includes a driving wheel and a force applying mechanism. The driving wheel rolls on the main track or the switching track and drives the car to go up, down or switch tracks. Since the car has no traction structure, the force applying mechanism presses the driving wheel against the main track or the switching track to generate a friction driving force. The load applied by the force applying mechanism directly determines the size of the friction driving force.

[0032] In this embodiment, the force applying mechanism is provided with a force applying load sensor for acquiring actual force applying load C', which can be a sensor for detecting displacement deformation variable or directly monitoring load force value; a suitable position along the running direction of the elevator is selected to detect the force applying load, and a representative position is selected as the detection position for monitoring and data acquisition. The representative position can be equidistant points on the main track, the landing position and the track change position. The landing position is the stopping position of the car, at which time the car load will change in real time, and special monitoring is required to prevent the influence of disturbance on the load. In addition, the track change position is required to be specially monitored because the arc track and inclined track will cause the force of the driving wheel to change, thereby affecting the change of the load of the force applying mechanism.

[0033] The car is provided with a weighing sensor for detecting the weight of the car, which can be an elevator car load measuring element used in the elevator equipment in the art for monitoring the deformation variable of the elastic element installed between the car and the suspension, thereby outputting the corresponding analog signal to enable the host device to acquire the load information of the car in real time.

[0034] The self-weight of the car is set as P, which is a constant value, and the weighing sensor detects the real-time load Q of the car, which is a variable value. The weight data A of the car is dynamically acquired in real time, which mainly includes the following three states:

[0035] 1) When the car is empty: the real-time weight data A of the car = P;

[0036] 2) When the passenger load changes on the landing position: the real-time weight data A of the car = P+Q;

[0037] 3) When the car runs along the switching track (arc track and inclined track): the real-time weight data A of the car = (P+Q)cosθ, θ is the included angle between the switching track and the main track.

[0038] In actual situation, the force applying load of the car needs to be adjusted in real time when the car is running normally. The required driving force B is calculated according to the real-time weight data A of the car, B=A(g+a), wherein g is 9.8 newtons / kilogram; and a is acceleration.

[0039] Considering a certain safety margin, the safety force applying load C is calculated, B=k*C*μ, wherein k is a safety factor, which is greater than or equal to 1 according to the requirement, and μ is the friction coefficient between the driving wheel and the track.

[0040] The force applying mechanism is provided with a force applying load adjusting unit, which can actively adjust the size of the force applying load, and the adjusting unit can be an electric push rod, a hydraulic or pneumatic cylinder, etc., and any structure capable of adjusting the pressing force can be used. According to the safety force applying load C, it is judged whether the actual force applying load C' meets the requirements, and when it does not meet the requirements, the actual force applying load C' is adjusted in real time through the force applying load adjusting unit until the actual force applying load C' meets the requirements.

[0041] The selection of the safety factor k needs to be comprehensively considered in combination with the use environment, use condition, state, etc.; the safety factor can be a static value, which is set according to different conditions; or the safety factor can be a dynamic value, which is dynamically set according to different use environments, conditions, states of the elevator.

[0042] Different use environments require different safety factors, such as humid environments and high-altitude environments, which will affect the performance of elevator parts, especially the friction coefficient and transmission efficiency related to the force applying load. When the above environmental conditions exist, a larger safety factor can be appropriately selected.

[0043] Different use conditions require different safety factors, such as conditions with large load fluctuations and high use frequency, for which a larger safety factor can be appropriately selected.

[0044] For different states of the elevator, different safety factors are selected, such as the probability of damage to parts increases with the use of the elevator, and the friction coefficient of the drive wheel decreases due to wear, which has the risk of slipping, so a larger safety factor can be appropriately selected.

[0045] Other structures involved in the present application are described in the patent application of the applicant, and can be understood by combining the conventional technical means of those skilled in the art. Here, no more repeated description is made.

[0046] The above implementation cases are only preferred embodiments of the present application, and do not limit the present application in any form. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Therefore, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application, which does not deviate from the technical solution of the present application, shall fall within the scope of protection of the technical solution of the present application.

Claims

1. A multi-car intelligent parallel elevator force load dynamic adjustment method, an elevator system comprising a plurality of cars, at least two main tracks and a plurality of switching tracks, the switching tracks being used to connect two different main tracks, the car switching the main track through the switching track to continue upward or downward during upward or downward, the car being provided with a driving device, characterized in that, The car has no traction mechanism, the driving device generates force load to drive the car, and the dynamic adjustment method comprises the following steps: 1) Real-time acquisition of the weight information of the car and the real-time force load of the car; The car weight information includes the self-weight of the car and the load of the car; The car weight information data A includes at least the following three states: (1) When the car is empty: the real-time weight data A of the car is P, and P is the self-weight of the car; (2) When the passenger load changes at the level position: the real-time weight data A of the car is P+Q, and Q is the real-time load of the car; (3) When the car runs along the switching track: the real-time weight data A of the car is (P+Q)cosθ, and θ is the included angle between the switching track and the main track; 2) Reserving a safety margin according to the weight information of the car, and calculating the safe force load of the car; The safe force load C, B=k*C*μ Wherein, k is the safety factor, k≥1; μ is the friction coefficient between the driving device and the main track or the switching track; B is the driving force required by the weight information data A of the car; The calculation formula of the driving force B required by the weight information data A of the car is: B=A(g+a) Wherein, g is 9.8 Newton / kilogram; a is acceleration; 3) Compare the difference between the real-time force load and the safe force load, adjust the force load of the driving device according to the safe force load, and make the output load of the driving device equal to the safe force load.

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