CN103145015A - Elevator balance coefficient detection method - Google Patents

Abstract

The invention relates to an elevator balance coefficient detection method, which comprises the following steps of: controlling an elevator to be operated to a position on which the weight of a hoisting rope of a lift car side and the weight of a hoisting rope of a counter-weight side are just mutually offset; after a traction machine is controlled to be operated at the zero speed, opening a band-type brake; after the elevator is detected to be not moved, recording the output torque of the traction machine; and according to the traction ratio of the traction machine, the traction sheave radius, the rated load of the elevator, the output torque and the acceleration of gravity of a detection site, calculating the elevator balance coefficient K. The elevator balance coefficient detection method disclosed by the invention has the advantages of simple detection process and high test speed.

Description

The method of inspection of balance coefficient of elevator

[technical field]

The present invention relates to elevator, particularly relate to a kind of method of inspection of balance coefficient of elevator.

[background technology]

For guaranteeing the safe operation of elevator, elevator all needs to detect equilibrium factor when detecting.GB regulation " equilibrium factor should in 40%～50% scope ".Test method for " should car with unloaded and nominal payload 25%, 40%, 50%, 75%, 100%, 110% the time do upper and lower operation; when car and counterweight run to the same level position; the numerical value of record current, voltage and rotating speed ", determine the equilibrium factor of elevator by drafting electric current-curve of loads.

But there are the shortcomings such as the powerful degree of work, test step is complicated, the test duration is long in this method.

[summary of the invention]

Based on this, be necessary to provide the method for inspection of the fast balance coefficient of elevator of a kind of test speed.

A kind of method of inspection of balance coefficient of elevator comprises: control elevator and run to the hoist ropes of cage side and the position that the hoist ropes weight of heavy side is just in time cancelled out each other; Control and open band-type brake after towing machine operates in zero-speed, the output torque of elevator without record towing machine this moment after mobile detected; Calculate balance coefficient of elevator K according to the acceleration due to gravity of traction ratio, traction sheave radius, elevator payload ratings, described output torque and the detection site of towing machine.

Therein in embodiment, described balance coefficient of elevator Wherein T1 is described output torque, and I is described traction ratio, and R is described traction sheave radius, and Q is described elevator payload ratings, and g is described acceleration due to gravity.

Therein in embodiment, after the described output torque step that records towing machine, comprise the following steps: that also controlling towing machine does not move, make the elevator Sliding carriage with three wheels, and record elevator from beginning to slip car to the time T that accelerates to default speed V cost; Calculate car mass M 1,

In embodiment, also comprise the step of calculating counterweight mass M 2 therein, $M2=\frac{K*\mathrm{Qg}*T}{2V}+0.5*K*Q.$

Therein in embodiment, after the described output torque step that records towing machine, control before towing machine do not move, also comprise the step of closing band-type brake, described control towing machine does not move, making the elevator Sliding carriage with three wheels, and record elevator from beginning to slip car to the step that accelerates to the time T of presetting speed V cost, is to control to open band-type brake after towing machine does not move, make the elevator Sliding carriage with three wheels, and record elevator and be opened to the time T that accelerates to default speed V cost from band-type brake.

In embodiment, described default speed V is half of elevator nominal rated speed Vrate therein.

In embodiment, elevator also comprises the step of closing band-type brake after accelerating to default speed V therein.

In embodiment, by integrated controller, elevator is controlled and calculated in testing process therein.

The method of inspection process of above-mentioned balance coefficient of elevator is simple, and test speed is fast.

[description of drawings]

Fig. 1 is the diagram of circuit of the method for inspection of balance coefficient of elevator in an embodiment;

To be car and counterweight be hung on schematic diagram on traction sheave by hoist ropes to Fig. 2;

Fig. 3 is the diagram of circuit of the method for inspection of balance coefficient of elevator in another embodiment.

[specific embodiment]

For purpose of the present invention, feature and advantage can more be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.

Frequency-changing elevator occupies almost all elevator market at present, divides from the relation of variable frequency control and elevator control logic, and the variable frequency control elevator can be divided into split type and integrated two types.The advantages such as integrated controller is high due to integrated level, wiring is simple, easy to use become the main flow of apparatus for controlling elevator.Variable frequency control that integrated controller is integrated and elevator logic control function can be completed performance-oriented towing machine vector controlled and distance control accurately, realize the direct stop of elevator.Integrated controller obtains the location information of elevator by being arranged on coder on machine shaft, in order to realize elevator accurately distance control; Integrated controller is integrated input/output control circuit can be controlled the action that sequential is controlled band-type brake contactless switch and operation contactless switch according to elevator, controls easily and flexibly the starting of elevator and stops; Integrated controller obtains speed signal by the detection coder and realizes speed control, realizes high-precision torque control by detecting electric current, can obtain the very high torque value of precision.

Fig. 1 is the diagram of circuit of the method for inspection of balance coefficient of elevator in an embodiment, comprises the following steps:

S110 controls elevator and runs to the hoist ropes of cage side and the position that the hoist ropes weight of heavy side is just in time cancelled out each other.

In the present embodiment, the hoist ropes of cage side and be half position of elevator height to the position that the hoist ropes weight of heavy side is just in time cancelled out each other, can control by integrated controller and stop after elevator runs to this position, guarantee the hoist ropes of cage side and the hoist ropes weight of heavy side is cancelled out each other.To be car and counterweight be hung on schematic diagram on traction sheave by hoist ropes to Fig. 2, and the radius of traction sheave 12 is R, the general steel rope that adopts of hoist ropes 14.

S120 controls and opens band-type brake after towing machine operates in zero-speed, the output torque of elevator without record towing machine this moment after mobile detected.

In the present embodiment, control towing machine by integrated controller and operate in zero-speed, and control band-type brake and open, integrated controller detect elevator without movement after, record the towing machine output torque T1 of this moment.

S130 calculates balance coefficient of elevator K.

According to formula

$(M2-M1)*g=\frac{T1*I}{R}---\left(1\right)$

Can calculate

$K=\frac{M2-M1}{Q}=\frac{T1*I}{R*g*Q}---\left(2\right)$

Wherein T1 is the output torque of recording in S120, and I is the traction ratio of towing machine, and R is the traction sheave radius, and Q is the elevator payload ratings, and g is the acceleration due to gravity of detection site.

The method of inspection process of above-mentioned balance coefficient of elevator is simple, and test speed is fast.And due to integrated controller integrated variable frequency control, elevator apart from controlling and the elevator logic control, therefore in the embodiment that elevator is controlled and calculated by integrated controller, the detection of balance coefficient of elevator can be completed in integrated controller automatically, and need to be by extra equipment.Particularly, can at first elevator be got to maintenance model, measure with the guidance panel starting, above-mentioned steps can be completed automatically, automatically test result is left in guidance panel correlation function code after measurement is completed, and show, do not need other manual operation step.Test speed is fast, and result is accurate, and has improved the integrated degree of elevator integrated controller.

Even balance coefficient of elevator is in specialized range, car weight and counterweight weight also may exceed scope of design, bring potential safety hazard will for like this operation of elevator.And if have a kind of method can obtain simultaneously easily equilibrium factor, car weight and counterweight weight, the time can obtain easily these data at elevator debugging and test so, can further improve the elevator Operation safety.

Therefore the present invention provides an embodiment that can calculate car weight and counterweight weight in addition, referring to Fig. 3, comprises the following steps:

S110 controls elevator and runs to the hoist ropes of cage side and the position that the hoist ropes weight of heavy side is just in time cancelled out each other.

S120 controls and opens band-type brake after towing machine operates in zero-speed, the output torque of elevator without record towing machine this moment after mobile detected.

S122 records output and closes band-type brake after torque.

After integrated controller is recorded output torque T1, the control band-type brake is closed.It is out of service because can control towing machine in follow-up step S131 closing band-type brake, will not fall if do not close the band-type brake elevator, is unfavorable for measuring accurately.

S130 calculates balance coefficient of elevator K.

Step S130 also can carry out after step S131 completes again.Step S110, S120 and S130 idiographic flow can be with reference to embodiment illustrated in fig. 1.

S131 controls towing machine and does not move, and makes the elevator Sliding carriage with three wheels, and records elevator from beginning to slip car to the time T that accelerates to default speed V cost.

Integrated controller is controlled towing machine and is not moved, and open band-type brake, make the elevator Sliding carriage with three wheels, controller detects elevator speed simultaneously, controlling band-type brake when elevator accelerates to default speed V closes, record elevator from beginning to accelerate to the time T that reaches V, namely from opening band-type brake to the time of closing band-type brake.

S132 calculates car mass M 1.

Fig. 2 is carried out force analysis, can get

$\frac{M2-M1}{M2+M1}=\frac{A}{g}---\left(3\right)$

If the acceleration/accel during the elevator Sliding carriage with three wheels is A, due to A=V/T, according to formula (1) (2) (3), can get

$M1=\frac{K*Q*g*T}{2V}-0.5*K*Q---\left(4\right)$

S134 calculates counterweight mass M 2.

Equally according to formula (1) (2) (3),

$M2=\frac{K*Q*g*T}{2V}-0.5*K*Q---\left(5\right)$

Wherein, the order of step S132 and S134 can be changed.In certain embodiments, also can as required, only calculate car mass M 1 or counterweight mass M 2.

In embodiment, default speed V is made as half of elevator nominal rated speed Vrate therein, and formula (4), (5) become respectively

$M1=\frac{K*Q*g*T}{\mathrm{Vrate}}-0.5*K*Q---\left(6\right)$

$M2=\frac{K*Q*g*T}{\mathrm{Vrate}}-0.5*K*Q---\left(7\right)$

The method of inspection of balance coefficient of elevator embodiment illustrated in fig. 3 in the calculated equilibrium coefficient, utilizes the equilibrium factor that calculates to calculate simultaneously car mass M 1 and counterweight mass M 2, the safety that has further improved elevator.

The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.Should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (8)

1. the method for inspection of a balance coefficient of elevator comprises:

Control elevator and run to the hoist ropes of cage side and the position that the hoist ropes weight of heavy side is just in time cancelled out each other;

Control and open band-type brake after towing machine operates in zero-speed, the output torque of elevator without record towing machine this moment after mobile detected;

Calculate balance coefficient of elevator K according to the acceleration due to gravity of traction ratio, traction sheave radius, elevator payload ratings, described output torque and the detection site of towing machine.

2. the method for inspection of balance coefficient of elevator according to claim 1, is characterized in that, described balance coefficient of elevator

Wherein T1 is described output torque, and I is described traction ratio, and R is described traction sheave radius, and Q is described elevator payload ratings, and g is described acceleration due to gravity.

3. the method for inspection of balance coefficient of elevator according to claim 1, is characterized in that, after the described output torque step that records towing machine, also comprises the following steps:

Control towing machine and do not move, make the elevator Sliding carriage with three wheels, and record elevator from beginning to slip car to the time T that accelerates to default speed V cost;

Calculate car mass M 1, $M1=\frac{K*Q*g*T}{2V}-0.5*K*Q.$

4. the method for inspection of balance coefficient of elevator according to claim 3, is characterized in that, also comprises the step of calculating counterweight mass M 2, $M2=\frac{K*Q*g*T}{2V}+0.5*K*Q.$

5. the method for inspection of balance coefficient of elevator according to claim 3, it is characterized in that, after the described output torque step that records towing machine, control before towing machine do not move, also comprise the step of closing band-type brake, described control towing machine does not move, make the elevator Sliding carriage with three wheels, and record elevator from beginning to slip the step of car to the time T that accelerates to default speed V cost, to control to open band-type brake after towing machine does not move, make the elevator Sliding carriage with three wheels, and record elevator and be opened to the time T that accelerates to default speed V cost from band-type brake.

6. the method for inspection of balance coefficient of elevator according to claim 3, is characterized in that, described default speed V is half of elevator nominal rated speed Vrate.

7. the method for inspection of balance coefficient of elevator according to claim 3, is characterized in that, elevator also comprises the step of closing band-type brake after accelerating to default speed V.

8. the method for inspection of the described balance coefficient of elevator of any one according to claim 1-7, is characterized in that, by integrated controller, elevator controlled and calculated in testing process.

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