CN114772419A - Elevator control system and method based on rack transmission - Google Patents

Abstract

The invention discloses an elevator control system and method based on rack transmission. The system includes a plurality of rack transmission devices and an elevator car; the plurality of rack transmission devices are respectively arranged on the periphery of the elevator car, Each of the rack gears includes a drive motor, a braking device, a transmission gear and a rack guide rail; in each of the rack gears, the drive motor is drivingly connected to the transmission gear, so The braking device is movably connected to the transmission gear, the transmission gear is fixed to the elevator car and is movably connected to the rack guide rail, the rack guide rail is fixed to the inside of the elevator shaft, and the drive motor drives the drive motor. The transmission gear rotates to move the transmission gear on the rack guide rail, thereby driving the elevator car to move up and down. The beneficial effects of the invention are as follows: the stability of the elevator operation and the comfort of riding the elevator are improved, and the reliability and operation safety of the elevator are improved.

Description

A kind of elevator control system and method based on rack drive

technical field

The invention relates to the technical field of elevator car rack gear transmission, and more particularly, to an elevator control system and method based on rack rack transmission.

Background technique

As a kind of public transportation, the most basic and essential function of the elevator is to deliver people to the destination floor smoothly and safely. Therefore, the reliability and stability of elevator equipment and operation methods are important criteria for elevator systems.

The existing traditional elevator is mainly composed of the elevator car, the traction machine system, the traction steel rope, the balance counterweight buffer, the guide device and the electric control system. The sheave rotates, and through the friction force (also called traction force) between the traction rope and the traction sheave, it drives the car and the counterweight to move up and down. The elevator of this structure relies on the friction force of the traction steel rope to lift the car. It has a counterweight, guide rails, and a machine room where the traction machine system needs to be installed. During operation, the elevator faces slipping, stopping the ladder, and the broken rope. The car falls etc. accident risk.

To sum up, the existing traditional elevators basically use the transmission mechanism type of wire rope lifting and lowering, and the following problems will occur in practical applications:

1. A dedicated elevator machine room on the top floor is required, which takes up a lot of space, needs to set counterweight, and costs high.

2. The wire rope is easy to break and slip, and the failure rate is high.

3. Super high-rises face a substantial increase in the length and weight of steel wire ropes, and the maintenance or replacement costs are high; or super-high-rises adopt the operation of changing ladders, and it is inconvenient to take the ladder.

4. Due to the suspension lift, the stability is poor and the comfort of the elevator is not good.

SUMMARY OF THE INVENTION

The invention provides an elevator control system and method based on rack drive, which solves the need for a special elevator machine room on the top floor in the prior art, which takes up a lot of space, needs to set a counterweight, has high cost, and the wire rope is easy to break and slip. , the failure rate is high, the length and weight of steel wire ropes for super high-rise buildings are greatly increased, and the maintenance or replacement cost is high; or the super-high-rise buildings adopt the operation of changing the ladder, which is inconvenient to take the ladder, because it is a suspension lift, the stability is poor, and the comfort of riding the ladder is poor. Bad question.

In order to solve the above problems, on the one hand, the present invention provides an elevator control system based on rack transmission, which includes a plurality of rack transmission devices and an elevator car; a plurality of the rack transmission devices are respectively arranged in the elevator car the periphery of the rack, each of the rack gears includes a drive motor, a braking device, a transmission gear and a rack guide rail;

In each of the rack gears, the drive motor is drivingly connected to the transmission gear, the braking device is movably connected to the transmission gear, and the transmission gear is fixed to the elevator car and movably connected to the transmission gear. The rack guide rail is fixed on the inside of the elevator shaft, and the transmission gear is driven to rotate by a driving motor to make the transmission gear move on the rack guide rail, thereby driving the elevator car to move up and down .

An auxiliary guide wheel is also included, and the auxiliary guide wheel is arranged on one side of the elevator car to assist the movement of the elevator car.

The plurality of rack gears include a left rack gear and a right rack gear, and the rack guide rails of the left rack gear and the rack rails of the right rack gear are respectively arranged on both sides of the elevator shaft.

On the one hand, a kind of elevator control method based on rack transmission is provided, which is realized by adopting the above-mentioned elevator control system based on rack transmission, and the elevator control method includes:

Controlling the rotation of the driving motor and driving the transmission gear to rotate so that the transmission gear moves on the rack guide rail, thereby driving the elevator car to move up and down;

By controlling the rotation speed of the drive motor, the elevator car is accelerated at start, at a constant speed in the middle and decelerated at the end;

The position of the elevator car is locked or released by braking or releasing the valve by controlling the braking device.

The control drive motor rotates to drive the transmission gear to rotate so that the transmission gear moves on the rack guide rail, thereby driving the elevator car to move up and down, including:

Get layer selection information;

Obtain the required moving direction of the elevator car according to the current stop state and the floor selection information;

The rotation of the driving motor is controlled according to the moving direction, and the transmission gear is driven to rotate so that the transmission gear moves on the rack guide rail, thereby driving the elevator car to move up and down.

The step of controlling the rotational speed of the drive motor to make the elevator car accelerate at start, at a constant speed in the middle, and decelerate at the end includes:

When the elevator car is in the preset first stage of up and down movement, the elevator car is accelerated to move by controlling the rotational speed of the drive motor;

When the elevator car is in the preset second stage of up-and-down movement, the elevator car is moved at a constant speed by controlling the rotational speed of the drive motor;

When the elevator car is in the preset third stage of up-and-down movement, the elevator car is decelerated to move by controlling the rotational speed of the drive motor.

The position of locking or releasing the elevator car by braking or releasing the valve by controlling the brake device includes:

When the elevator car starts to move, release the valve by controlling the brake device to release the position of the elevator car;

When the elevator car ends its movement, the position of the elevator car is locked by controlling the braking device to brake.

Also includes:

The operating parameters and safety parameters of the elevator car are monitored in real time to execute a preset decision-making mechanism according to the operating parameters.

The real-time monitoring of the operating parameters and safety parameters of the elevator car to execute a preset decision-making mechanism according to the operating parameters includes:

Real-time monitoring of elevator operating parameters and safety parameters;

Judging whether the elevator car belongs to the first type of fault according to the operating parameters, and if so, alarming;

According to the safety parameter, it is judged whether the elevator car belongs to the second type of failure, and if so, the braking device is immediately controlled to brake to stop the elevator car from moving.

In one aspect, a computer-readable storage medium is provided, wherein a plurality of instructions are stored in the storage medium, and the instructions are adapted to be loaded by a processor to execute the above-mentioned method for controlling an elevator based on a rack drive.

The beneficial effect of the invention is that the friction between the traditional elevator car guide shoe and the guide rail is replaced by the gear and rack coupling transmission, so as to improve the running stability and ride comfort of the elevator, and improve the reliability and operation safety of the elevator.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a front cross-sectional view of an elevator control system based on rack drive provided by an embodiment of the present invention;

Fig. 2 is a top view of an elevator control system based on rack drive provided by an embodiment of the present invention;

FIG. 3 is a flow chart of an elevator control method based on rack drive provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation shown in the drawings Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more features. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present invention, the word "exemplary" is used to mean "serving as an example, illustration or illustration". Any embodiment of this disclosure described as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the present invention. In the following description, details are set forth for the purpose of explanation. It will be understood by one of ordinary skill in the art that the present invention may be practiced without the use of these specific details. In other instances, well-known structures and procedures have not been described in detail so as not to obscure the description of the present invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and features disclosed herein.

The invention provides an elevator control system and method based on rack drive, which changes the way of lifting and lowering the car with the traditional elevator traction rope, and replaces the friction between the guide shoe and the guide rail of the traditional elevator car with the coupling transmission of the gear and the rack; The elevator operation is changed from the up and down movement of the car pulled by the traction machine through the traction rope to the self-driven orbital movement of the elevator car, which saves the complex traction machine system and traditional equipment such as machine room, traction steel rope and balance counterweight. The system is compact and stable in operation, which further improves the safety of operation and the convenience of maintenance, and reduces the maintenance cost.

Referring to FIG. 1 and FIG. 2, FIG. 1 is a front cross-sectional view of an elevator control system based on rack drive provided by an embodiment of the present invention, and FIG. 2 is an elevator control based on rack drive provided by an embodiment of the present invention. The top view of the system, an elevator control system based on rack transmission provided by the present invention includes a plurality of rack transmission devices and an elevator car 6; Around the periphery, each of the rack gears includes a drive motor 1, a braking device 2, a transmission gear 3 and a rack guide 4; in each of the rack gears, the drive motor 1 is drivingly connected In the transmission gear 3, the braking device 2 is movably connected to the transmission gear 3, the transmission gear 3 is fixed to the elevator car 6 and is movably connected to the rack guide rail 4, and the rack The guide rail 4 is fixed on the inner side of the elevator shaft, and the drive motor 1 drives the transmission gear 3 to rotate, so that the transmission gear 3 moves on the rack guide rail 4, thereby driving the elevator car 6 to move up and down. The elevator control system based on rack drive further includes an auxiliary guide wheel 5 , which is arranged on one side of the elevator car 6 to assist the elevator car 6 to move. The plurality of rack gears include a left rack gear and a right rack gear. The rack guide rails 4 of the left rack gear and the rack rails 4 of the right rack gear are respectively arranged on both sides of the elevator shaft.

In this embodiment, the two drive motors 1 arranged on the car rotate under the drive of the gear motor drive unit, and the gears connected to them move on the racks on both sides of the elevator shaft, thereby lifting the car to move up and down. For the stability of the elevator operation and the comfort of riding the elevator, the rotation speeds of the two drive gears are synchronized and consistent. The rest such as elevator sensor equipment (ladder call, ladder switch, etc.), electric control equipment, etc. are the same as the traditional elevator configuration. The elevator of this structure can well overcome the shortcomings of traditional elevators in construction, operation and maintenance. The patent of the present invention changes the traditional elevator operation from the up and down movement of the elevator car pulled by the traction machine through the traction rope into the self-driven orbital movement of the elevator car 6, so that the system has fewer structural components, compact and stable operation, and improved operation safety and maintenance reliability. .

Referring to FIG. 3 , FIG. 3 is a flowchart of an elevator control method based on rack drive provided by an embodiment of the present invention, and the elevator control method based on rack drive adopts the above-mentioned one based on rack drive. The elevator control system is implemented, and the elevator control method includes steps S1-S3:

S1, control the driving motor 1 to rotate, and drive the transmission gear 3 to rotate to make the transmission gear 3 move on the rack guide rail 4, thereby driving the elevator car 6 to move up and down; Step S1 includes steps S11-S13:

S11. Obtain layer selection information.

In this embodiment, like a traditional elevator, it is necessary to first obtain information on the desired direction or floor selected by the user, and then control the elevator to go to the user's floor or to the target floor.

S12. Acquire the required moving direction of the elevator car 6 according to the current landing state and the floor selection information.

In this embodiment, as in the prior art, the elevator should have the following functions:

Data logic processing: Acquire the layer selection information to start the gear motor rotation, and control the motor rotation according to the preset car speed and acceleration curve. Monitor and judge the moving speed and acceleration parameters of the car; according to the signal of the floor sensor, judge the position and stop of the elevator floor.

Operation process control: control the car to open and close the door safely; control the car to move up and down safely; control the car to stop stably and smoothly.

Equipment status monitoring: real-time monitoring of motor speed, car moving speed and acceleration, floor selection information, floor stop status, leveling sensor signal, car weighing sensor signal, elevator door light curtain sensor signal, emergency and safety braking unit information Wait.

Troubleshooting and emergency handling: When the operation process and equipment status signals are abnormal, alarm in time and emergency troubleshooting.

S13 , control the driving motor 1 to rotate according to the moving direction, and drive the transmission gear 3 to rotate so that the transmission gear 3 moves on the rack guide rail 4 , thereby driving the elevator car 6 to move up and down.

In this embodiment, the moving direction of the car (up or down) is determined according to the current stop state; a rotation command is issued to the two gear motors through the gear motor drive unit; at the same time, the emergency and safety braking units are commanded to release the brakes, and the elevator The car 6 starts running.

S2, by controlling the rotational speed of the drive motor 1, the elevator car 6 is accelerated at start, at a constant speed in the middle and decelerated at the end; step S2 includes steps S21-S23:

S21 , when the elevator car 6 is in the preset first stage of up-and-down movement, the elevator car 6 is accelerated to move by controlling the rotational speed of the drive motor 1 .

In this embodiment, the operation of the elevator system can be controlled according to the pre-designed working curve, such as: acceleration at start, constant speed in the middle, and deceleration to stop. The first phase, which can be the first trigger part of the operation, causes the elevator car 6 to accelerate.

S22 , when the elevator car 6 is in the preset second stage of up-and-down movement, the elevator car 6 is moved at a constant speed by controlling the rotational speed of the drive motor 1 .

In this embodiment, the second stage may be the second trigger part in operation, and this stage makes the elevator car 6 move at a constant speed.

S23 , when the elevator car 6 is in the preset third stage of up-and-down movement, the elevator car 6 is decelerated to move by controlling the rotational speed of the drive motor 1 .

In this embodiment, the third stage may be the last trigger part of the operation, and this stage causes the elevator car 6 to decelerate.

S3 , by controlling the braking device 2 to brake or release the valve to lock or release the position of the elevator car 6 . Steps S31-S32:

S31 , when the elevator car 6 starts to move, release the valve by controlling the brake device 2 to release the position of the elevator car 6 .

In this embodiment, before the car moves, the brake device 2 is released, and the car moves to the destination floor normally.

S32 , when the elevator car 6 finishes moving, control the braking device 2 to brake to lock the position of the elevator car 6 .

In this embodiment, when the elevator car 6 reaches the destination floor and stops running, the braking device 2 applies a brake to lock the position of the car.

Preferably, the elevator control method includes step S4:

S4. Monitor the running parameters of the elevator car 6 in real time to execute a preset decision-making mechanism according to the running parameters. Step S4 includes steps S41-S43:

S41. Real-time monitoring of elevator running parameters and safety parameters.

In this embodiment, the detection of running parameters is related to the accuracy, stability and comfort of elevator running. Such as the rotational speed value and consistency of the drive motor 1; the moving speed and acceleration of the car; the call button (level selection information), the stop status, the leveling sensor signal; the car weighing sensor signal, the elevator door light curtain sensor signal, etc. .

Safety parameter detection: Detect external fault signals related to elevator and passenger safety, such as fire alarm switch signal, main power switch signal, system emergency stop switch signal, etc.; Stall fall, car overweight, etc.

S42. Determine whether the elevator car 6 belongs to the first type of fault according to the operating parameters, and if so, alarm.

In this embodiment, when it is found that the operating parameter exceeds the design value, an alarm is given through the alarm display unit.

S43. Determine whether the elevator car 6 belongs to the second type of failure according to the safety parameter, and if so, immediately control the braking device 2 to brake to stop the elevator car 6 from moving.

In this embodiment, when the elevator (stalling or overweight, etc.) falls or the system is powered off, the brake immediately uses the spring force to brake the brake to stop the car from moving.

In addition, the described elevator control method based on rack drive also includes steps S5-S6:

S5. When more than one floor selection information is obtained, according to the current stop floor position, the floor closest (short) to the current floor is preferentially selected as the current car moving destination floor, and then the next floor selection information is processed sequentially.

S6. With big data analysis function: obtain parameters that can characterize the deterioration state of elevator equipment - such as the running (cumulative) time of drive motor 1 (or power-on), which can characterize the deterioration state of elevator lifting components such as wear and life; such as various types of elevators The cumulative number of opening and closing of the switch represents the life stage of the switch (it is related to the safety and reliability of the elevator). The system conducts a big data correlation analysis on a large number of accumulated equipment state parameters, combined with operation data and fault data, evaluates and predicts the deterioration state of the elevator, and judges the necessity of maintenance when the system is running and implements maintenance when necessary.

The elevator control system based on rack drive may also include an interface for connecting to other systems in the building, a network interface and a mobile data network connection function.

Such as firefighting system and monitoring system; when a fire or a safety accident occurs, the safety braking unit can be activated in time to stop the elevator response and cooperate with the interface connected to other systems in the building.

The network interface can transmit the operation information, fault events and other operation data collected in the daily operation process to the building integrated management system (BAS).

The mobile data network can realize the remote monitoring function: the operation and maintenance personnel can retrieve or receive the operation information and fault event information through the mobile phone to guide the daily operation and maintenance.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructions, or by instructions that control relevant hardware, and the instructions can be stored in a computer-readable storage medium, and loaded and executed by the processor. To this end, an embodiment of the present invention provides a storage medium, in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute any one of the rack drive-based elevator control methods provided by the embodiments of the present invention. A step of.

Wherein, the storage medium may include: a read only memory (ROM, Read Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and the like.

Due to the instructions stored in the storage medium, the steps in any of the elevator control methods based on rack drive provided by the embodiments of the present invention can be executed. Therefore, any of the gear-based elevator control methods provided by the embodiments of the present invention can be implemented. The beneficial effects that can be achieved by the rail-driven elevator control method can be seen in the previous embodiments, which will not be repeated here.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. An elevator control system based on rack rail transmission is characterized by comprising a plurality of rack rail transmission devices and an elevator car; the rack transmission devices are respectively arranged on the periphery of the elevator car, and each rack transmission device comprises a driving motor, a braking device, a transmission gear and a rack guide rail;

in each rack and pinion transmission device, the driving motor is connected with the transmission gear in a driving mode, the braking device is movably connected with the transmission gear, the transmission gear is fixed on the elevator car and movably connected with the rack guide rail, the rack guide rail is fixed on the inner side of the elevator shaft, and the transmission gear is driven to rotate through the driving motor so as to enable the transmission gear to move on the rack guide rail, so that the elevator car is driven to move up and down.

2. The elevator control system of claim 1, further comprising an auxiliary guide sheave disposed on a side of the elevator car to assist movement of the elevator car.

3. The elevator control system according to claim 1, wherein the plurality of rack gears includes a left rack gear and a right rack gear, and a rack guide rail of the left rack gear and a rack guide rail of the right rack gear are respectively disposed on both sides in the elevator shaft.

4. An elevator control method based on a rack and pinion transmission, which is realized by the elevator control system based on the rack and pinion transmission according to any one of claims 1-3, and is characterized by comprising the following steps:

controlling a driving motor to rotate, and driving a transmission gear to rotate so as to enable the transmission gear to move on a rack guide rail, so that an elevator car is driven to move up and down;

the elevator car starts to accelerate, and decelerates in a midway uniform speed and a final stage by controlling the rotating speed of the driving motor;

the position of the elevator car is locked or released by controlling a brake device to brake or release a valve.

5. The elevator control method according to claim 4, wherein the controlling of the driving motor to rotate drives a pinion to rotate to move the pinion on a rack guide rail to drive the elevator car up and down comprises:

acquiring layer selection information;

obtaining the moving direction required by the elevator car according to the current floor stopping state and the floor selection information;

and controlling a driving motor to rotate according to the moving direction, and driving a transmission gear to rotate so as to enable the transmission gear to move on a rack guide rail, so that the elevator car is driven to move up and down.

6. The elevator control method according to claim 4, wherein the accelerating the starting, the constant speed in the middle of the elevator car and the decelerating the final stage by controlling the rotational speed of the drive motor comprises:

when the elevator car is in a first stage preset by up-and-down movement, the elevator car is accelerated by controlling the rotating speed of the driving motor;

when the elevator car is in a second stage preset by up-and-down movement, the elevator car moves at a constant speed by controlling the rotating speed of the driving motor;

when the elevator car is in a preset third stage of up-and-down movement, the elevator car is decelerated by controlling the rotating speed of the driving motor.

7. The elevator control method of claim 4, wherein the braking or releasing the valve to lock or release the position of the elevator car by controlling a braking device comprises:

releasing a valve to release a position of the elevator car by controlling a braking device when the elevator car starts moving;

braking by controlling a braking device to lock a position of the elevator car when the elevator car ends movement.

8. The elevator control method according to claim 4, further comprising:

and monitoring the operation parameters and safety parameters of the elevator car in real time so as to execute a preset decision mechanism according to the operation parameters.

9. The elevator control method according to claim 8, wherein the monitoring of the operation parameters and safety parameters of the elevator car in real time to perform a predetermined decision mechanism according to the operation parameters comprises:

monitoring elevator operation parameters and safety parameters in real time;

judging whether the elevator car belongs to a first type of fault or not according to the operation parameters, and if so, giving an alarm;

and judging whether the elevator car belongs to a second type of fault or not according to the safety parameters, and if so, immediately controlling the braking device to brake so as to stop the elevator car.

10. A computer-readable storage medium having stored thereon a plurality of instructions adapted to be loaded by a processor to perform a method of controlling a rack drive based elevator according to any of claims 4-9.

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