CN103145015B - The method of inspection of balance coefficient of elevator - Google Patents

Abstract

The present invention relates to a kind of method of inspection of balance coefficient of elevator, comprising: the position that the hoist ropes weight controlling the hoist ropes and counterweight-side that elevator runs to cage side is just in time cancelled out each other; Control to open band-type brake after towing machine operates in zero-speed, the Driving Torque recording now towing machine after elevator is without movement detected; Acceleration due to gravity according to the traction ratio of towing machine, traction sheave radius, elevator payload ratings, described Driving Torque and detection site calculates balance coefficient of elevator K.The process that the present invention detects is simple, and test speed is fast.

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 ensureing the safe operation of elevator, all need when elevator detects to detect equilibrium factor.National regulations " equilibrium factor should in 40% ~ 50% scope ".Test method is " should do upper and lower operation car with unloaded and nominal payload 25%, 40%, 50%, 75%, 100%, 110% time; when car and counterweight run to same level position; the numerical value of record current, voltage and rotating speed ", is determined the equilibrium factor of elevator by drafting electric current-curve of loads.

But there is 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 the method for inspection of the balance coefficient of elevator providing a kind of test speed fast.

A method of inspection for balance coefficient of elevator, comprising: the position that the hoist ropes weight controlling the hoist ropes and counterweight-side that elevator runs to cage side is just in time cancelled out each other; Control to open band-type brake after towing machine operates in zero-speed, the Driving Torque recording now towing machine after elevator is without movement detected; Acceleration due to gravity according to the traction ratio of towing machine, traction sheave radius, elevator payload ratings, described Driving Torque and detection site calculates balance coefficient of elevator K.

Wherein in an embodiment, described balance coefficient of elevator wherein T1 is described Driving 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.

Wherein in an embodiment, after the Driving Torque step of described record towing machine, also comprise the following steps: control towing machine do not run, make elevator Sliding carriage with three wheels, and record elevator from slip car to accelerate to scheduled rate V spend time T; Calculate car mass M1,

Wherein in an embodiment, also comprise the step calculating counterweight mass M2, $M2=\frac{K*\mathrm{Qg}*T}{2V}+0.5*K*Q.$

Wherein in an embodiment, after the Driving Torque step of described record towing machine, control before towing machine do not run, also comprise the step of closing band-type brake, described control towing machine does not run, make elevator Sliding carriage with three wheels, and record elevator from slip car to the step of time T accelerating to scheduled rate V and spend, be control to open band-type brake after towing machine does not run, make elevator Sliding carriage with three wheels, and record elevator from band-type brake be opened to accelerate to scheduled rate V spend time T.

Wherein in an embodiment, described scheduled rate V is the half of elevator nominal rated speed Vrate.

Wherein in an embodiment, elevator also comprises the step of closing band-type brake after accelerating to scheduled rate V.

Wherein in an embodiment, by integrated controller elevator controlled in testing process and calculate.

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

[accompanying drawing explanation]

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

Fig. 2 is car and counterweight are hung on traction sheave schematic diagram by hoist ropes;

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

[detailed description of the invention]

For enabling object of the present invention, feature and advantage more become apparent, and are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.

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

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, the position that the hoist ropes weight controlling the hoist ropes and counterweight-side that elevator runs to cage side is just in time cancelled out each other.

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

S120, controls to open band-type brake after towing machine operates in zero-speed, the Driving Torque recording now towing machine after elevator is without movement 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 after detecting that elevator is without movement, record towing machine Driving Torque T1 now.

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 Driving Torque recorded in S120, and I is the traction ratio of towing machine, and R is traction sheave radius, and Q is 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 be integrated with variable frequency control, elevator distance controlling and elevator logic control due to integrated controller, therefore in the embodiment by integrated controller elevator controlled and calculate, the detection of balance coefficient of elevator automatically can complete in integrated controller, and does not need by extra equipment.Particularly, first elevator can be got to maintenance model, start with guidance panel and measure, above-mentioned steps can complete automatically, automatically test result is left in guidance panel correlation function code after measurement completes, and show, do not need other manual operation step.Test speed is fast, and result is accurate, and improves the integrated degree of elevator integrated controller.

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

Therefore the present invention's embodiment of providing one can calculate car weight and load weight in addition, see Fig. 3, comprises the following steps:

S110, the position that the hoist ropes weight controlling the hoist ropes and counterweight-side that elevator runs to cage side is just in time cancelled out each other.

S120, controls to open band-type brake after towing machine operates in zero-speed, the Driving Torque recording now towing machine after elevator is without movement detected.

S122, closes band-type brake after recording Driving Torque.

Integrated controller controls band-type brake and closes after recording Driving Torque T1.It is out of service because can control towing machine in follow-up step S131 for closing band-type brake, will fall, be unfavorable for measuring accurately if do not close band-type brake elevator.

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 with reference to embodiment illustrated in fig. 1.

S131, control towing machine do not run, make elevator Sliding carriage with three wheels, and record elevator from slip car to accelerate to scheduled rate V spend time T.

Integrated controller controls towing machine and does not run, and open band-type brake, make elevator Sliding carriage with three wheels, controller detects elevator speed simultaneously, control band-type brake to close when elevator accelerates to scheduled rate V, record elevator from accelerate to the time T reaching V, namely from opening band-type brake to closing time of band-type brake.

S132, calculates car mass M1.

Force analysis is carried out to Fig. 2, can obtain

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

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

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

S134, calculates counterweight mass M2.

It is same 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 exchanged.In certain embodiments, also as required, only car mass M1 or counterweight mass M2 can be calculated.

Wherein in an embodiment, scheduled rate V is set to the half of elevator nominal rated speed Vrate, then 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, while calculated equilibrium coefficient, utilizes the equilibrium factor calculated to calculate car mass M1 and counterweight mass M2 simultaneously, further increases the safety of elevator.

The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It 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 (7)

1. a method of inspection for balance coefficient of elevator, comprising:

The position that the hoist ropes weight controlling the hoist ropes and counterweight-side that elevator runs to cage side is just in time cancelled out each other;

Control to open band-type brake after towing machine operates in zero-speed, the Driving Torque recording now towing machine after elevator is without movement detected;

Acceleration due to gravity according to the traction ratio of towing machine, traction sheave radius, elevator payload ratings, described Driving Torque and detection site calculates balance coefficient of elevator K;

After the Driving Torque step of described record towing machine, also comprise the following steps:

Control towing machine do not run, make elevator Sliding carriage with three wheels, and record elevator from slip car to accelerate to scheduled rate V spend time T;

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

Wherein Q is described elevator payload ratings, and g is described acceleration due to gravity.

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 Driving Torque, and I is described traction ratio, and R is described traction sheave radius.

3. the method for inspection of balance coefficient of elevator according to claim 1, is characterized in that, also comprises the step calculating counterweight mass M2, $M2=\frac{K*Q*g*T}{2V}-0.5*K*Q.$

4. the method for inspection of balance coefficient of elevator according to claim 1, it is characterized in that, after the Driving Torque step of described record towing machine, control before towing machine do not run, also comprise the step of closing band-type brake, described control towing machine does not run, make elevator Sliding carriage with three wheels, and record elevator from slip car to the step of time T accelerating to scheduled rate V and spend, control to open band-type brake after towing machine does not run, make elevator Sliding carriage with three wheels, and record elevator from band-type brake be opened to accelerate to scheduled rate V spend time T.

5. the method for inspection of balance coefficient of elevator according to claim 1, is characterized in that, described scheduled rate V is the half of elevator nominal rated speed Vrate.

6. the method for inspection of balance coefficient of elevator according to claim 1, is characterized in that, elevator also comprises the step of closing band-type brake after accelerating to scheduled rate V.

7. according to the method for inspection of the balance coefficient of elevator in claim 1-6 described in any one, it is characterized in that, by integrated controller elevator controlled in testing process and calculate.