Elevator capable of automatically compensating traction force and compensation method applying elevator

Abstract

The invention relates to an elevator capable of automatically compensating traction force and a compensation method applying the elevator, and the elevator comprises a counterweight pressure sensor, a lift car pressure sensor, a traction steel wire rope, a guide wheel, a traction wheel, a lift car, a counterweight, a lift car diversion sheave, a counterweight diversion sheave and a compensation mechanism, the counterweight diversion sheave is installed at the upper end of the counterweight, one end of the traction steel wire rope is connected with the counterweight pressure sensor and sequentially wound around the counterweight diversion sheave, the guide wheel, the traction wheel and the lift car diversion sheave, the other end of the traction steel wire rope is connected with the lift car pressure sensor, and the compensation mechanism is connected with the lower end of the lift car and the lower end of the counterweight. According to the elevator capable of automatically compensating the traction force and the compensation method applying the elevator, the traction force of the whole system is dynamically regulated and controlled by continuously monitoring the tension of the counterweight side traction steel wire rope and the tension of the lift car side traction steel wire rope and providing the pull-down force of the lift car when compensation is needed, so that the lift car is prevented from rushing to the top.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to an elevator that automatically compensates for traction force and a compensation method using the elevator. Background Art

[0002] Most modern elevators are traction elevators, which mainly include traction machines, traction ropes, guide wheels, car return rope wheels, counterweight return rope wheels, and compensation chains. During the operation of the traction elevator, the length of the traction ropes on the car side and the counterweight side is constantly changing, which causes the weight of the traction ropes on both sides of the traction wheel to change. When the car is at the lowest floor station, most of the weight of the traction rope acts on the car side; and when the car is at the highest floor station, most of the weight of the traction rope acts on the counterweight side. This change has little effect on the operating performance of the elevator when the elevator lifting height is not large, but when the elevator lifts above a certain height, it will seriously affect the stability of the elevator operation and endanger the safety of passengers. Therefore, an elevator compensation device is needed to balance the weight change caused by the height change of the elevator. Summary of the invention

[0003] The main purpose of the present invention is to provide an elevator that automatically compensates for traction force and a compensation method using the same to solve the above technical problems by continuously monitoring the traction wire rope tension on the counterweight side and the traction wire rope tension on the car side to balance the weight change of the elevator.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] An elevator that automatically compensates for traction force, comprising a counterweight pressure sensor, a car pressure sensor, a traction wire rope, a guide wheel, a traction wheel, a car, a counterweight, a car return rope wheel, a counterweight return rope wheel and a compensation mechanism, wherein the car return rope wheel is installed at the upper end of the car, the counterweight return rope wheel is installed at the upper end of the counterweight, one end of the traction wire rope is connected to the counterweight pressure sensor, and is wound around the counterweight return rope wheel, the guide wheel, the traction wheel and the car return rope wheel in sequence, the other end of the traction wire rope is connected to the car pressure sensor, and the compensation mechanism connects the lower end of the car and the lower end of the counterweight;

[0006] The compensation mechanism includes a rigid connection structure, a flexible connection structure, a compensation wire rope, a first compensation guide wheel, a second compensation guide wheel and a compensation clamping structure. The rigid connection structure is fixed at the lower end of the car, the flexible connection structure is fixed at the lower end of the counterweight, the first compensation guide wheel is installed below the car, the second compensation guide wheel is installed below the counterweight, and the compensation clamping structure is arranged opposite to the first compensation guide wheel, one end of the compensation wire rope is fixed on the rigid connection structure, and the other end is fixed on the end of the flexible connection structure, and the compensation wire rope is wound around the second compensation guide wheel and between the first compensation guide wheel and the compensation clamping structure.

[0007] The present invention also provides another solution, a compensation method for the elevator with automatic traction compensation, characterized in that it includes the following steps:

[0008] S1. Obtain the traction wire rope tension T1 on the counterweight side and the traction wire rope tension T2 on the car side detected by the counterweight pressure sensor and the car pressure sensor, and judge whether T1≥T2. If the judgment result is T1≥T2, proceed to step S2; if the judgment result is T1<T2, proceed to step S4;

[0009] S2. Determine whether the traction wire rope tension T1 on the counterweight side and the traction wire rope tension T2 on the car side satisfy the following relationship:

[0010]

[0011] Wherein, T1 is the tension of the traction wire rope on the counterweight side, T2 is the tension of the traction wire rope on the car side, f is the equivalent friction coefficient, and α is the wrap angle of the traction wire rope on the traction sheave;

[0012] If the determination result satisfies the relational expression, the process proceeds to step S3; if the determination result does not satisfy the relational expression, the elevator is running normally;

[0013] S3, start compensation, the compensation clamping structure is driven to clamp the compensation wire rope, so that the compensation wire rope on the car side is subjected to tension F, and re-enter step S1;

[0014] S4, determine whether compensation is started, if compensation is started, go to step S5; if compensation is not started, the elevator runs normally;

[0015] S5. Gradually drive the compensating clamping structure to loosen the compensating steel wire rope, and re-enter S1.

[0016] As a preferred technical solution, in step S3, the pulling force F satisfies the following relationship:

[0017]

[0018] Among them, T1 is the traction wire rope tension on the counterweight side, T2 is the traction wire rope tension on the car side, f is the equivalent friction coefficient, α is the wrap angle of the traction wire rope on the traction sheave, and F is the compensation wire rope tension on the car side.

[0019] The beneficial effects of the present invention are as follows: the above-mentioned elevator with automatic traction compensation and the compensation method using the same continuously monitor the tension of the traction wire rope on the counterweight side and the tension of the traction wire rope on the car side, and dynamically adjust the traction force of the entire system by pulling down the car when compensation is needed to prevent the car from hitting the top. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an elevator with automatic traction compensation according to the present invention;

[0021] Figure 2 A force diagram of an elevator that automatically compensates for traction force according to the present invention;

[0022] Figure 3 The figure is a wireframe flow chart of the compensation method according to the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] Please combine Figure 1 and Figure 2 As shown, an elevator with automatic traction force compensation includes a counterweight pressure sensor 1, a car pressure sensor 4, a traction wire rope 9, a guide wheel 2, a traction wheel 3, a car 8, a counterweight 7, a car return rope wheel 6, a counterweight return rope wheel 5 and a compensation mechanism 10, wherein the car return rope wheel 6 is installed at the upper end of the car 8, the counterweight return rope wheel 5 is installed at the upper end of the counterweight 7, one end of the traction wire rope 9 is connected to the counterweight pressure sensor 1, and the counterweight return rope wheel 5, the guide wheel 2, the traction wheel 3 and the car return rope wheel 6 are wound in sequence, the other end of the traction wire rope 9 is connected to the car pressure sensor 4, and the compensation mechanism 10 connects the lower end of the car 8 and the lower end of the counterweight 7;

[0025] The compensation mechanism 10 includes a rigid connection structure 101, a flexible connection structure 102, a compensation wire rope 103, a first compensation guide wheel 105, a second compensation guide wheel 104 and a compensation clamping structure 106. The rigid connection structure 101 is fixed to the lower end of the car, the flexible connection structure 102 is fixed to the lower end of the counterweight 7, the first compensation guide wheel 105 is installed below the car 8, the second compensation guide wheel 104 is installed below the counterweight 7, and the compensation clamping structure 106 is connected to the first compensation guide wheel 105. The compensation guide wheels 105 are arranged relatively to each other, one end of the compensation wire rope 103 is fixed on the rigid connection structure 101, and the other end is fixed on the flexible connection structure 102, and the compensation wire rope 103 is wound around the second compensation guide wheel 104 and between the first compensation guide wheel 105 and the compensation clamping structure 106, and the compensation clamping structure 106 drives the clamping compensation wire rope 103 to apply tension to the compensation wire rope on the car side, so as to prevent the car from hitting the top due to the imbalance of tension of the traction wire rope 9.

[0026] like Figure 3 As shown, a compensation method for the elevator with automatic traction compensation includes the following steps:

[0027] S1. Obtain the traction wire rope tension T1 on the counterweight side and the traction wire rope tension T2 on the car side detected by the counterweight pressure sensor and the car pressure sensor, and judge whether T1≥T2. If the judgment result is T1≥T2, proceed to step S2; if the judgment result is T1<T2, proceed to step S4;

[0028] S2. Determine whether the traction wire rope tension T1 on the counterweight side and the traction wire rope tension T2 on the car side satisfy the following relationship:

[0029]

[0030] Wherein, T1 is the tension of the traction wire rope on the counterweight side, T2 is the tension of the traction wire rope on the car side, f is the equivalent friction coefficient, and α is the wrap angle of the traction wire rope on the traction sheave;

[0031] If the determination result satisfies the relational expression, the process proceeds to step S3; if the determination result does not satisfy the relational expression, the elevator is running normally;

[0032] S3, start compensation, drive the compensation clamping structure, clamp the compensation wire rope, make the compensation wire rope on the car side be subjected to tension F, and re-enter step S1;

[0033] S4, determine whether compensation is started, if compensation is started, go to step S5; if compensation is not started, the elevator runs normally;

[0034] S5, gradually drive the compensation clamping structure to loosen the compensation wire rope and re-enter S1.

[0035] In step S3, the tension F satisfies the following relationship:

[0036]

[0037] Among them, T1 is the traction wire rope tension on the counterweight side, T2 is the traction wire rope tension on the car side, f is the equivalent friction coefficient, α is the wrap angle of the traction wire rope on the traction sheave, and F is the compensation wire rope tension on the car side.

[0038] The above-described embodiments are only preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. An elevator with automatic traction compensation, characterized in that: It includes a counterweight pressure sensor, a car pressure sensor, a traction wire rope, a guide wheel, a traction wheel, a car, a counterweight, a car return rope wheel, a counterweight return rope wheel and a compensation mechanism, wherein the car return rope wheel is installed at the upper end of the car, the counterweight return rope wheel is installed at the upper end of the counterweight, one end of the traction wire rope is connected to the counterweight pressure sensor, and is wound around the counterweight return rope wheel, the guide wheel, the traction wheel and the car return rope wheel in sequence, the other end of the traction wire rope is connected to the car pressure sensor, and the compensation mechanism connects the lower end of the car and the lower end of the counterweight; The compensation mechanism includes a rigid connection structure, a flexible connection structure, a compensation wire rope, a first compensation guide wheel, a second compensation guide wheel and a compensation clamping structure. The rigid connection structure is fixed at the lower end of the car, the flexible connection structure is fixed at the lower end of the counterweight, the first compensation guide wheel is installed below the car, the second compensation guide wheel is installed below the counterweight, and the compensation clamping structure is arranged opposite to the first compensation guide wheel, one end of the compensation wire rope is fixed on the rigid connection structure, and the other end is fixed on the end of the flexible connection structure, and the compensation wire rope is wound around the second compensation guide wheel and between the first compensation guide wheel and the compensation clamping structure.

2. A compensation method for an elevator automatically compensating for traction force as claimed in claim 1, characterized in that: The following steps are included: S1. Obtain the traction wire rope tension T1 on the counterweight side and the traction wire rope tension T2 on the car side detected by the counterweight pressure sensor and the car pressure sensor, and judge whether T1≥T2. If the judgment result is T1≥T2, proceed to step S2; if the judgment result is T1<T2, proceed to step S4; S2. Determine whether the traction wire rope tension T1 on the counterweight side and the traction wire rope tension T2 on the car side satisfy the following relationship: Wherein, T1 is the tension of the traction wire rope on the counterweight side, T2 is the tension of the traction wire rope on the car side, f is the equivalent friction coefficient, and α is the wrap angle of the traction wire rope on the traction sheave; If the determination result satisfies the relational expression, the process proceeds to step S3; if the determination result does not satisfy the relational expression, the elevator is running normally; S3, start compensation, the compensation clamping structure is driven to clamp the compensation wire rope, so that the compensation wire rope on the car side is subjected to tension F, and re-enter step S1; S4, determine whether compensation is started, if compensation is started, go to step S5; if compensation is not started, the elevator runs normally; S5. Gradually drive the compensating clamping structure to loosen the compensating steel wire rope, and re-enter S1.

3. The compensation method according to claim 2, characterized in that: In step S3, the tension F satisfies the following relationship: Among them, T1 is the traction wire rope tension on the counterweight side, T2 is the traction wire rope tension on the car side, f is the equivalent friction coefficient, α is the wrap angle of the traction wire rope on the traction sheave, and F is the compensation wire rope tension on the car side.

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