CN114772419A

CN114772419A - Elevator control system and method based on rack transmission

Info

Publication number: CN114772419A
Application number: CN202210290408.1A
Authority: CN
Inventors: 戚建淮; 王凡; 崔宸; 唐娟; 刘航
Original assignee: Shenzhen Y&D Electronics Information Co Ltd
Current assignee: Shenzhen Y&D Electronics Information Co Ltd
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-07-22

Abstract

The invention discloses an elevator control system and method based on rack transmission, wherein the system comprises a plurality of rack 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 to the elevator car and is movably connected with the rack guide rail, the rack guide rail is fixed to the inner side of the elevator shaft, and the transmission gear is driven to rotate through the driving motor to enable the transmission gear to move on the rack guide rail, so that the elevator car is driven to move up and down. The invention has the beneficial effects that: the stability of elevator operation and the travelling comfort of taking advantage of the elevator are promoted, and the reliability of elevator use and operation safety are improved.

Description

Elevator control system and method based on rack transmission

Technical Field

The invention relates to the technical field of rack rail transmission of an elevator car, in particular to an elevator control system and method based on rack rail transmission.

Background

As a public transport means, the most essential function of an elevator is to smoothly and safely deliver people to a destination floor. Therefore, the reliability and the smoothness of the elevator equipment and the operation mode are used as important measurement standards of the elevator system.

The conventional elevator mainly comprises an elevator car, a traction machine system, a traction steel rope, a balance counterweight buffer, a guide device, an electric control system and the like, wherein the operation of the elevator is that a motor drives a winding drum or a friction rope wheel of the traction machine to rotate, and the car and the counterweight device are driven to move up and down by the friction force (also called traction force) between the traction rope and the traction wheel. The elevator with the structure lifts the car by means of friction force of the traction steel rope, has a balance counterweight, a guide rail and a machine room needing to be provided with a traction machine system, and is exposed to accident risks of slipping, elevator stopping, floor clamping, rope breaking, car falling and the like during operation.

In summary, the conventional elevator basically adopts a transmission mechanism type of steel wire rope lifting, and the following problems can occur in practical application:

1. the special elevator machine room at the top layer is needed, the occupied space is large, the counterweight needs to be arranged, and the cost is high.

2. The steel wire rope has the phenomena of easy fracture and slipping, and the failure rate is higher.

3. The length and the weight of the ultra-high layer adjacent steel wire rope are greatly increased, and the maintenance or replacement cost is high; or the operation of replacing the ladder is adopted at the super high-rise, and the taking of the ladder is inconvenient.

4. Because the elevator is suspended and lifted, the stability is poor and the comfort of taking the elevator is not good.

Disclosure of Invention

The invention provides an elevator control system and method based on rack rail transmission, which solves the problems that in the prior art, a special elevator machine room with a top layer is needed, the occupied space is large, a counterweight needs to be arranged, the cost is high, a steel wire rope has the phenomena of easy fracture and slipping, the failure rate is high, the length and the weight of the steel wire rope facing an ultrahigh layer are greatly increased, and the maintenance or replacement cost is high; or the operation of replacing the ladder by adopting the super high-rise ladder is inconvenient to take the ladder, and the problems of poor stability and poor comfort of taking the ladder are solved because the ladder is suspended and lifted.

In order to solve the above problems, in one aspect, the present invention provides an elevator control system based on rack drive, including a plurality of rack drive 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.

Still include supplementary leading wheel, supplementary leading wheel set up in one side of elevator car is in order to assist the elevator car motion.

And the rack guide rails of the left rack transmission device and the rack guide rails of the right rack transmission device are respectively arranged on two sides in the elevator shaft.

In one aspect, an elevator control method based on rack and pinion transmission is provided, and is implemented by using an elevator control system based on rack and pinion transmission as described above, and the elevator control method includes:

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

the elevator car is accelerated by controlling the rotating speed of the driving motor, and is decelerated at a constant speed in the midway and a final stage;

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

The control driving motor rotates, drives the drive gear to rotate so that the drive gear moves on the rack guide rail, and therefore the elevator car is driven to move up and down, and the control driving device 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.

The method for controlling the rotation speed of the driving motor to enable the elevator car to start to accelerate, to decelerate at a constant speed midway and at the final stage comprises the following steps:

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

The position of locking or releasing the elevator car by controlling a brake to brake or release a valve comprises:

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

when the elevator car finishes moving, braking is carried out by controlling a braking device to lock the position of the elevator car.

Further comprising:

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

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

In one aspect, a computer-readable storage medium having stored therein a plurality of instructions adapted to be loaded by a processor to perform a rack drive-based elevator control method as described above is provided.

The invention has the beneficial effects that: the friction mode of the guide shoe and the guide rail of the traditional elevator car is replaced by the coupling transmission of the gear and the rack, so that the running stability and the riding comfort of the elevator are improved, and the use reliability and the running safety of the elevator are improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a front cross-sectional view of a rack drive based elevator control system according to an embodiment of the present invention;

fig. 2 is a plan view of an elevator control system based on a rack gear transmission according to an embodiment of the present invention;

fig. 3 is a flowchart of an elevator control method based on rack drive according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein 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 invention. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the 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 transmission, which changes the traditional elevator hoisting rope lift car mode, and replaces the friction between the guide shoe and the guide rail of the traditional elevator car into the gear and rack coupling transmission; the traditional elevator operation is changed into the self-driving rail motion of the elevator car from the up-and-down movement of the traction car of the traction machine through the traction rope, so that the complex traction machine system and traditional equipment such as a machine room, a traction steel rope, a balance counterweight and the like are omitted, the system is compact and operates stably, the operation safety and the maintenance convenience are further improved, and the maintenance cost is reduced.

Referring to fig. 1 and 2, fig. 1 is a front sectional view of an elevator control system based on rack and pinion transmission according to an embodiment of the present invention, fig. 2 is a top view of an elevator control system based on rack and pinion transmission according to an embodiment of the present invention, and the elevator control system based on rack and pinion transmission according to the present invention includes a plurality of rack and pinion transmission devices and an elevator car 6; the rack transmission devices are respectively arranged on the periphery of the elevator car 6, and each rack transmission device comprises a driving motor 1, a braking device 2, a transmission gear 3 and a rack guide rail 4; in each rack and pinion transmission device, the driving motor 1 is connected with the transmission gear 3 in a driving mode, the braking device 2 is movably connected with the transmission gear 3, the transmission gear 3 is fixed on the elevator car 6 and is movably connected with the rack guide rail 4, the rack guide rail 4 is fixed on the inner side of an elevator shaft, and the driving motor 1 drives the transmission gear 3 to rotate so that the transmission gear 3 moves on the rack guide rail 4, and therefore the elevator car 6 is driven to move up and down. The elevator control system based on the rack and pinion transmission further comprises an auxiliary guide wheel 5, wherein the auxiliary guide wheel 5 is arranged on one side of the elevator car 6 to assist the elevator car 6 to move. And the rack guide rails 4 of the left rack transmission device and the rack guide rails 4 of the right rack transmission device are respectively arranged on two sides in the elevator shaft.

In this embodiment, 2 driving motors 1 disposed on the car are driven by the gear motor driving unit to rotate, and gears connected with the driving motors move on the rack rails on both sides of the shaft, thereby lifting the car to move up and down. For the stability of elevator operation and riding comfort, the rotation speeds of 2 driving gears are synchronous and consistent. The rest of the elevator equipment such as elevator sensor equipment (landing calls, landing switches, etc.), electronic control equipment, etc. are the same as in a conventional elevator arrangement. The elevator with the structure can well overcome the defects of the traditional elevator in the aspects of construction, operation and maintenance. The invention changes the traditional elevator operation that the traction machine pulls the elevator car to move up and down through the traction rope into the elevator car 6 self-driven track motion, 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 and pinion transmission according to an embodiment of the present invention, where the elevator control method based on rack and pinion transmission is implemented by using an elevator control system based on rack and pinion transmission as described above, and the elevator control method includes steps S1-S3:

s1, controlling the driving motor 1 to rotate, driving the transmission gear 3 to rotate so as to enable the transmission gear 3 to move on the rack guide rail 4, and driving the elevator car 6 to move up and down; step S1 includes steps S11-S13:

and S11, acquiring the layer selection information.

In this embodiment, as in the conventional elevator, it is necessary to first obtain the direction that the user needs to arrive or the floor information that the user needs to arrive, and then control the elevator to go to the floor where the user is located or to the destination floor.

And S12, acquiring the moving direction required by the elevator car 6 according to the current floor stopping state and the floor selection information.

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

data logic processing: and acquiring floor selection information, starting a gear motor to rotate, and controlling the motor to rotate according to preset speed and acceleration curves of the lift car. Monitoring and judging parameters of the moving speed and the acceleration of the lift car; and judging the elevator floor position and the floor stopping according to the elevator floor sensor signal.

Controlling the operation process: controlling the car to safely open and close the door; controlling the lift car to move up and down safely; the lift car is controlled to stably and stably stop at a floor.

And (3) monitoring the equipment state: the method comprises the steps of monitoring the rotating speed of a motor, the moving speed and the acceleration of a lift car, floor selection information, a floor stopping state, a floor leveling sensor signal, a lift car weighing sensor signal, a lift door light curtain sensor signal, emergency and safety brake unit information and the like in real time.

And (3) fault and emergency treatment: when the running process and the equipment state signals are abnormal, alarming is timely carried out, and emergent fault treatment is carried out.

And S13, controlling the driving motor 1 to rotate according to the moving direction, and driving 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 the embodiment, the moving direction (ascending or descending) of the car is judged according to the current floor stopping state; sending a rotation command to the 2 gear motors through the gear motor driving unit; and simultaneously, the emergency and safety braking unit brake is commanded to be released, and the elevator car 6 is started to run.

S2, controlling the rotating speed of the driving motor 1 to accelerate the starting, uniform speed in the middle and slow down in the final stage of the elevator car 6; step S2 includes steps S21-S23:

and S21, when the elevator car 6 is in a first stage preset by up-and-down movement, controlling the rotating speed of the driving motor 1 to accelerate the elevator car 6.

In this embodiment, the operation of the elevator system can be controlled according to the working curve designed in advance, for example: starting acceleration, midway uniform speed and deceleration stop. The first phase, which may be the first trigger in operation, accelerates the elevator car 6.

And S22, when the elevator car 6 is in a second stage preset by up-and-down movement, controlling the rotation speed of the driving motor 1 to enable the elevator car 6 to move at a constant speed.

In this embodiment the second phase, which may be the second active part of the operation, causes the elevator car 6 to move at a constant speed.

And S23, when the elevator car 6 is in a third stage preset by the up-and-down movement, the elevator car 6 is decelerated by controlling the rotation speed of the driving motor 1.

In this embodiment the third phase can be the final trigger part of the operation, which phase decelerates the movement of the elevator car 6.

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

s31, releasing the valve by controlling the braking device 2 to release the position of the elevator car 6 when the elevator car 6 starts moving.

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

S32, braking by controlling the braking device 2 to lock the position of the elevator car 6 when the elevator car 6 ends moving.

In this embodiment, when the elevator car 6 reaches the destination floor and stops operating, the braking device 2 brakes to lock the car position.

Preferably, the elevator control method includes step S4:

and S4, monitoring the operation parameters of the elevator car 6 in real time to execute a preset decision mechanism according to the operation parameters. Step S4 includes steps S41-S43:

and S41, monitoring the elevator operation parameters and safety parameters in real time.

In this embodiment, the operation parameter detection: the elevator is accurate, stable and comfortable in operation. Such as the rotating speed value and consistency of the driving motor 1; car movement speed and acceleration; a ladder floor call button (floor selection information), a floor stop state, and a floor leveling sensor signal; car weighing sensor signal, door light curtain sensor signal etc..

Safety parameter detection: detecting external fault signals for shutting down the elevator and the safety of passengers, such as fire-fighting alarm switch signals, main power switch signals, system emergency stop switch signals and the like; and internal system fault signals such as door open and close fault, top or bottom rushing, stalling falling, overweight of the car and the like.

And S42, judging whether the elevator car 6 belongs to the first type of fault according to the operation parameters, and if so, giving an alarm.

In the embodiment, when the operating parameter is found to exceed the design value, the alarm is given through the alarm display unit.

And S43, judging whether the elevator car 6 belongs to a second type of fault according to the safety parameters, and if so, immediately controlling the braking device 2 to brake so as to stop the elevator car 6.

In the embodiment, when the elevator (stalled, overweight and the like) falls or the system is powered off, the brake immediately brakes by the spring force to stop the car from moving.

In addition, the method for controlling an elevator based on rack gear further comprises steps S5-S6:

and S5, when more than one floor selection information is obtained, preferentially selecting the floor closest to (short) the current floor as the current car moving target floor according to the current floor stopping position, and then sequentially processing the next floor selection information.

S6, having big data analysis function: acquiring parameters capable of representing the degradation state of the elevator equipment, such as running (accumulated) time of a driving motor 1 (or electrifying), and representing the degradation states of abrasion, service life and the like of an elevator lifting component; if the accumulated opening and closing times of various switches of the elevator represent the service life stage of the switch (the elevator is safe and reliable when closed). The system carries out big data correlation analysis on a large amount of accumulated equipment state parameters by combining operation data and fault data, evaluates and pre-judges the elevator degradation state, and judges the necessity of maintenance and implements maintenance when necessary during the operation of the system.

The elevator control system based on the rack rail transmission can also comprise an interface for connecting other systems of the building, a network interface and a mobile data network connection function.

Such as fire protection systems, monitoring systems; when a fire disaster or a man clamping safety accident occurs, the safety brake unit can be started in time to stop the elevator to respond and cooperate through the interface connected with other systems of the building.

The network interface may transmit operation data such as operation information and fault events collected during daily operation to a building integrated management system (BAS).

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

It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions, or by instructions controlling associated hardware, which may be stored in a computer-readable storage medium and loaded and executed by a processor. To this end, embodiments of the present invention provide a storage medium having stored therein a plurality of instructions that can be loaded by a processor to perform the steps in any of the methods for controlling an elevator based on a rack drive provided by embodiments of the present invention.

Wherein the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.

Because the instructions stored in the storage medium can execute the steps in any elevator control method based on rack and pinion transmission provided by the embodiment of the present invention, the beneficial effects that can be realized by any elevator control method based on rack and pinion transmission provided by the embodiment of the present invention can be realized, and detailed descriptions are omitted herein for the sake of detail in the foregoing embodiments.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

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;

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;

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;

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 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:

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;

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.